Exposing PseudoAstronomy

March 15, 2016

Neat Animation of Moon’s North Pole with LASER Altimetry – And Artifacts


I’ll be attending a µSymposium before the Lunar and Planetary Science Conference this coming weekend, and I just got a reminder e-mail today. Included in that e-mail was a link to an animation that shows Shackleton crater, a crater that is ON the moon’s north pole. As such, its interior is in permanent shadow.

BUT!! The Lunar Orbiter Laser Altimeter instrument (LOLA) on the Lunar Reconnaissance Orbiter (LRO) has plenty of data that allow it to be viewed: Click Me!.

I find this very neat — until the last decade, we could never see stuff in permanent shadow because we didn’t have the instrumentation. LOLA and LROC have allowed us to do that. And there are thousands of craters in permanent shadow on the moon that may hide water (which is what I’ll be presenting at the µSymposium).

For reference, the north pole of the moon is just about smack dab at the 10:30 position on the large crater’s rim. Just inside the rim, along a line from that small crater just outside the rim to the center of the crater.

But for pseudoscience, you may also notice that there are some artifacts in the data. There are radial streaks from the center of the frame (usually). There’s a prominent one diagonally from upper right to lower left on the upper wall of Shackleton itself. Others are more prominent towards the edges of the animation.

These are not lunar roads nor subways nor trollies nor anything else made by an ancient civilization. They are artifacts in the data itself. LOLA is very well calibrated, and the “average” (root-mean-square) uncertainty is under 5 meters in elevation data. But some tracks (orbits) are a bit off. And since LOLA is fundamentally measuring the time it takes light to bounce off the surface from a laser beam from the craft, it needs to know exactly where the craft was to get an accurate surface elevation.

And some are off by a bit. These manifest in this kind of product as ridges or troughs that are perfectly in a straight line, along the line of the orbital track. It’s something that scientists who use these data see and ignore because we know exactly what they are. But pseudoscientists will look at line artifacts like this, or at image seems in a mosaic, and claim things like they are artificial tram lines.

March 5, 2016

Do as I Say, Not as I Do to Find “Real” Image Anomalies


I finally submitted my first paper for peer-review in practically two years — roughly 350 hours in the last roughly 2 months to analyze the data and write and edit a paper on the craters on Pluto, Charon, Nix and Hydra. So now, in preparation for the big Lunar and Planetary Science Conference in two weeks, I have a few months of other, lunar, work to do in the next 12 days.

So, I’ve started to catch up with Richard Hoagland’s “The Other Side of Midnight” program. The “barely lovable” (as Art Bell has said) folks over at BellGab pointed me to a particular evening of January 30, 2016, where Richard had some of his imaging guys (yes, all guys) on talking about how to expose fakes. As in, people who fake anomalies in space images.

You can probably imagine that my eyebrows did more than rise just a bit.

I’m less than 20 minutes into the episode and already I’ve spotted some of the most ridiculous duplicity in what they are saying. Richard Hoagland and Will Farrar are saying over and over again that you have to go to the original data before you can say anything is real or not.

And they’ve pointed out some good examples, like the anomalies in Hale crater on Mars are all caused by the 3D projection and image compression done by the Mars Express images and it’s not there in the originals.

I’ll say it again: Richard stated on this program that doing any analysis on anything BUT the original images is completely useless. In fact, here’s one example, at about 16 minutes 15 seconds into the recording:

Will Farrar: “They’re going to claim they didn’t go out to get the thing…”

Richard Hoagland: “They didn’t go out and get, what? The original data?”

WF: “The raw. Yeah, the raw data, that’s–”

RH: “Well then it’s pointless! You blow them away on that basis alone! You can’t do science on second, third, fourth, fifth sources, you gotta go to the original. That’s the first rule!”

Another example, about 29 minutes 50 seconds into my recording, jumping off of Keith Laney saying that the first thing to do is get the raw data, Richard stated, “Yeah, that’s the first thing we all do! When we see something interesting – those of who who know how to do this ’cause we’ve been at this awhile – the first thing you do is go and find the NASA original. … Find the original. Do not go by what’s on the web. Never ever just go by what’s on the web, unless it is connected to original data step by step by step.”

I’m not 100% sure what he means by that last “unless…” part, unless it’s his way of giving himself an out. It’s hopelessly vague, for anyone could say that any product they make where they find an anomaly is from the original data and they can tell you the step-by-step process to get there. This was also at least the fifth time he talked about this, but the first time he gave himself the “unless,” so let’s proceed without it.

(Almost) everything that Richard has promulgated over the last few years is based on non-original images. To just mention just three, for examples:

(1) Everything he and others have done with Pluto and Charon has been done with third-generation data, at best. That is, raw data (1st) compressed on the craft, either lossy or lossless (2nd), and the posted lossy (a second layer of lossy) on public websites (3rd). The first batch of truly raw data will be released in April 2016, and it will only be what was on Earth as of encounter. Therefore, by Richard’s own rules, every analysis that he and others have done finding anomalies on Pluto and Charon is “pointless.”

(2) Everything he and others have done with Ceres and claims of cities and crashed spacecraft … see example 1 above. I’m not on the Dawn team, so I don’t know when their first or second batch of raw data will be publicly released. Therefore, by Richard’s own rules, every analysis that he and others have done finding anomalies on Ceres is “pointless.”

(3) His analysis of Chang’e 3 images claiming that there are giant glass structures on the moon was done with JPG-compressed images published on Chinese military websites. Not raw data. He claimed that this was proof that his analysis of Apollo images (which were 5th generation, at best, it’s been estimated) showing giant glass towers on the moon was real. Therefore, by Richard’s own rules, every analysis that he and others have done claiming from Apollo and Chang-e 3 images that there are giant glass cities on the moon is “pointless.”

Well … that was fun.

P.S. Around 15 minutes into the second hour of the program, Richard stated that you can’t possibly do any analysis on anything that’s only 30 pixels across. Well then, Expat’s deconstruction notwithstanding, Richard’s own statement completely disqualifies “Data’s Head” that he thinks he found in an image from Apollo on the moon that he claims shows an android’s head. It’s perhaps 15 pixels across, max.

January 10, 2016

Some Real Science: Lots of Grunt Work, Moon Craters


Over the last few days, I’ve been hunkering down due to the deadline for abstract submission to the premier planetary science conference, the Lunar and Planetary Science Conference. It’s held annually in March in Houston, TX. Everyone is allowed to submit up to two first-author abstracts, and I have, for the last couple years, done two. This year’s not an exception. I’ll post about my New Horizons -related one later.

This post is about my abstract entitled, “Developing a Global Lunar Crater Database, Complete for Craters ≥1 km.” Because the file sizes have to be <1 MB, the figures are low resolution.

There are many, many different purposes to conferences, though the primary is “communication with colleagues.” Within that are many different things, like talking about your research and getting ideas. Another is to be able to show colleagues what you are doing so that, if your name happens to come in, say, a grant application, they might just recognize it.

For LPSC this year, my non-New Horizons abstract is in that category. I’m setting myself up for writing a grant later this year to build a lunar crater catalog that contains a lot of information about roughly 1 million craters on the moon. It’s been rejected for a couple years, and one of the underlying reasons is that I don’t know how many craters there are, therefore I can’t give a good, accurate work effort estimate to do all the information-gathering about each crater.

This abstract is meant to answer part of that. I’ve been leveraging bits and pieces of funding from different sources over the last year to do the initial mapping part — identifying the craters and locating them and measuring their diameters. For this abstract, I’ve roughly 28% of the moon done. For the March conference, I’m hoping to be closer to 50%, and by the time the grants are due this autumn, 100% so I know how many craters I have to do more stuff with.

Two more things I want to talk about in this slightly longer post. First is grunt work. Science is not easy. Science is rarely glamorous. Science is sitting down and 99% of what you do no one will ever know about because it’s only the results – not that big data-gathering process – that form the bulk of your paper. Methods sections are usually <25% of a paper because relatively few people care about that in comparison with your results.

And trust me, sitting down and drawing circles for hundreds of hours on end is NOT glamorous. But the results are cool.

Second is why we care – why are the results "cool." One reason is that it just looks cool — seeing all those dots that indicate a crater, and seeing all the patterns that emerge tell us a lot about the different history of those areas of the moon. The main one is ages (more craters = older). But we can also do things like better understand what's hit the moon in the past, and hence what is likely to hit Earth in the future. We can study different materials even, which is why the second figure is devoted to permanently shadowed regions where there might be water (areas that never see the sun act as cold traps for water molecules).

Anyway, this is turning out longer than I wanted, so to wrap it up … that's one thing that has been occupying a lot of my time over the last few days. One down, one to go.

October 1, 2015

A New Interview and New Movie from New Horizons Data


Quick post before I get back to work (next podcast episode hopefully out this weekend).

First up, I was interviewed live for about 100 minutes on this past Sunday on David Livingston’s “The Space Show.” We spent the first half talking about my research (impact craters) and the second half about the education & public outreach that I do. Since it was live, and a call-in show, there was one call and many e-mailed questions that I responded to. There’s also an associated blog, so you can comment on the interview there if you wish.

Second, NASA has put out a press release about Charon (Pluto’s largest companion). There is a flyover animation of some of its many varied features, and I was the one who made the animation.

We have images of some areas of Charon from two different vantage points, as New Horizons flew by the body, and so we have a very, very early digital terrain / elevation model (DTM). I was able to use this in a non-exaggerated view of what it would be like to fly low through its massive canyon.

It looks a bit like an early 3D video game because of the somewhat low resolution, but I think it’s still pretty neat, and we should get better quality over the next few months as we better understand the surface and camera models.

September 23, 2015

A Piece of Lint Becomes a 10-Mile High Tower on the Moon


Introduction

I subscribe to Expat’s “Dork Mission” blog in my RSS reader, and so I’m privy to people other than Richard Hoagland that he has made an hobby of watching and looking for perversions of rationality. One such set of claims is by a self-titled “civilian intelligence analyst,” Robert Morningstar.

Robert Morningstar (or M* as he occasionally signs things and I’ll use for short) was on Richard Hoagland’s radio program on September 3, and on the program he discussed many things, but there was one in particular that I’d seen Expat discuss before, but I’d never really investigated myself.

The claim is so bizarre that I wanted to share it with you.

The Claim: Big Ben on the Moon

Robert has made this claim for at least a year, that he has found what he terms “Big Ben” (named for the famous London landmark), but on the Moon. He found this while analyzing lunar photographs. The object is 10 miles high, according to his analysis.

It was only when I heard how he did his analysis and I looked at the photos he presents, myself, that I decided this blog post was worth it.

The Photo

First off, it’s difficult to know what photographs he used in terms of catalog numbers. Robert, like many in his field of anomaly hunting, does not provide documentation to allow independent analysis, rather he only presents the image in and of itself. This also means I can’t go find other versions of it that might be earlier generations, nor can I find the highest quality nor resolution.

Based on the fiducials (crosshairs) faintly visible in the photograph, I think this was Apollo. From searching through Expat’s blog, I found I was correct, it’s Apollo image AS17-M-2366.

To wit, here is the photograph that he claims hosts “Big Ben,” which I got at higher resolution than from Richard Hoagland’s site from another site where M* was interviewed:

AS17-M-2366 Early Scan

AS17-M-2366 Early Scan (click to embiggen)

If you don’t see much, that’s not surprising. What Robert is calling “Big Ben” is a small apparent bright protrusion from the upper-left of the moon’s limb. Here is the enlargement that he provided to Richard:

“Big Ben on the Moon” According to Robert Morningstar (click to embiggen)

He Analyzed a Photograph of His Computer Screen

Let that heading sink in a moment. What Robert did, as he stated on-air, and is evident from the obvious slightly rotated-from-vertical pixels in the second image, is he took the first photo (likely higher resolution than I have, but again I don’t know what the photo is so I can’t look), he likely enlarged it on his computer screen (if he didn’t, that doesn’t matter for this analysis), and he then took a digital camera and took a photograph of his computer screen.

It’s from that photograph of his computer screen that he then did any and all subsequent analysis.

This is one of those cases where I’m literally at a loss for words. It’s almost a situation of Not Even Wrong. To put it as succinctly and briefly as I can, he has introduced a substantial amount of completely unnecessary artifacts into the image that the idea that he thinks this is a proper way to analyze an image makes me question every single other claim he might ever make in the future.

Put another way, he has somewhat close-ish to original “pixels” in the original image (again, this is a somewhat early scan of an early copy of an Apollo photograph). Why would you then go and take a picture of your computer screen and analyze that picture?!

Lint

Beyond the ridiculousness of analyzing a photo of his computer screen that was showing a digital image, there is a big red flag that indicates this is simply a bit of contamination (lint, dust, etc.) on the scanner that was used to scan the print: Just under 600 pixels away, there is a very obvious piece of lint on the print, a bright bit that’s 1-pixel-wide that has a slight bend at the end:

Lint in AS17-M-2366

Lint in AS17-M-2366 (click to embiggen)

Lint. Just like “Big Ben.”

And, as others on Expat’s blog have pointed out, in the next frame of that sequence of photographs (AS17-M-2367), from that scan generation, the approximate same pattern of lint has moved off the limb of the moon by what would be ~1000 km:

Moving Lint in Apollo Photograph Scans

Moving Lint

And, in classic pseudoscientific fashion, M* does not look for other scans of the same photograph and show us that the feature is still there, nor does he present us with any images from a half dozen other spacecraft that have photographed the entire moon since Apollo and shown us that the feature is still present.

In fact, towards the former point, Arizona State University is in the process of scanning all the Apollo photographs at much higher resolution than had been done years ago by the Lunar & Planetary Institute (LPI). Here’s the link to AS17-M-2366 where you can download a 1.2 GB version of the image, or you can browse a 660 KB or 11 MB version.

You’ll note that, if you take a look, those pieces of lint are gone. Now I suspect that if confronted by this, Robert would just say that it’s been removed by The Powers that Be to hide it and give fodder to debunkers like me.

Final Thoughts

Here’s the problem: If your only evidence is one version of one photograph, and no other version of that photograph, the next photograph in the series that shows almost the exact same area, nor any other photograph of that area shows the feature, chances are your first photograph is the one that’s wrong, not every other one.

Given that, and given the above, here’s another reason why I don’t have a problem classifying M* as a pseudoscientist. This is a quote from him when he was on a radio program discussing “Big Ben:”

Now these debunkers, they claim that that’s dust on the film, or an anomaly in the emulsion. Again, I’m just showing you a picture that was taken by Apollo 17 — a picture that’s been in the archives for 42 years and I just happen to be the one that found it and recognized it, so I show it to you. And what do you think that looks like? I told you what I think it looks like, so I named it that. I named it “Big Ben on the Moon.”

In that, he completely avoids the content of the criticisms of his claim, and he goes even one more step backwards: He seems unable to even consider that it might not be on the original image: “a picture that’s been in the archives for 42 years.”

Extraordinary claims require extraordinary evidence, and a feature that looks like lint, only found in one version of one photograph, that looks like lint in other areas of the photograph, and compounded with “analysis” of that feature on a photograph of that image being displayed on a computer screen, does not extraordinary evidence make.

September 9, 2015

Podcast Episode 140: Doomsmonth— September 2015


Doomsmonth: September.
What could it bring that hasn’t
Yet been wrought on Earth?

Are we all gonna die this month? You’ll need to listen to the episode to find out. I’ve heard lots of rumors floating around about various things causing our doom, and in this episode, I go through five of them and assess their validity and background.

The logical fallacies segment presents two logical fallacies: Correlation ≠ causation, and cherry picking. Otherwise there’s a bit of feedback from both Gavin and Graham, and that’s it for this nearly 40-minute episode.

August 5, 2015

Why I Called Richard Hoagland’s Radio Show Today, Why I Used a Pseudonym, and What We Learned


Introduction

Warning: This is a long post. It references several other blog posts I’ve written, and two audio clips. That said …

Richard Hoagland has his own radio program now, “The Other Side of Midnight,” on Art Bell’s “Dark Matter Digital Network.” It’s a two-hour program that programmatically airs live, Monday through Friday, from 1AM until 3AM Mountain Time (hence it really airs Tuesday through Saturday in the US except Hawai’i). It is young, only in its third week, but already many patterns have emerged.

Readers of this blog and listeners to my podcast will know that I have critiqued many of Richard Hoagland’s claims in the past. Heck, the tree of episodes of my podcast even has a specific section for Richard Hoagland’s claims that I’ve addressed.

Last night / this morning, Richard had open lines calls. I made it through and was on for just about 13.5 minutes. Here’s why I called, why I was “Robert from Wisconsin,” and what we learned. Oh, and the reason why I’m outing myself here is that someone already e-mailed Richard and told him it was me.

Why Richard — Aren’t I Beating Up on Him?

Right off the bat, one might ask why Richard occupies a whole category of my astronomical interest in fringe claims. There really are two reasons, but first off, if you’re asking this question and you think I’m beating up on him, you should ask yourself, “Does Stuart have to justify why he focuses on any particular claimant or set of claims? Does he not have a right to do any he wants that interest him?”

In addition, I recommend you read this blog post: “Do Skeptics Hate the People They Debunk?”

That out of the way, there are, as I said, two reasons. First, Art Bell and Coast to Coast AM. And, Richard was one of the more frequent guests on said late-night paranormal program for nearly two decades. I spent a lot of time listening, and hence listening to Richard Hoagland. One is usually wont to focus on something that they hear more often than things they don’t.

Second, you can hardly swing a dead mouse in planetary science fringe claims and NOT hit a topic that Richard Hoagland has dipped into. He is prolific. And, I study planetary geology and, even more specifically, images and image analysis. Richard Hoagland focuses on claimed “geologic” features on other planets and moons and asteroids and comets, and he uses image analysis (faultily, I’d argue, but uses it nonetheless).

So, because of what I listen to, and because of his own prolific behavior in the fields that I focus on, Richard Hoagland rises to the top in terms of claimants that I tend to focus on.

Why Did I Call?

I called Richard’s radio program because I have often been encouraged to call into programs that he is on to ask him questions. This has been by fans of Richard, and/or by fans of my own material. Occasionally, it’s been in the form of “put up or shut up,” that I shouldn’t be arguing to no one, I should ask him specifically for explanations or justifications of his claims rather than just writing about them here or podcasting about them.

In addition, I’ve been encouraged by many people to “debate” Richard. That’s a separate topic entirely, but as a flavor, I wanted to see what would happen if I were to call, and attempt to just discuss one or two very specific topics with him, to get an idea of how a debate might play out. More on that in the “What I Learned” section of this post.

Why Was I “Robert from Wisconsin” Instead of “Stuart from Colorado”

I’ve never really known if Richard knows of me or not. Some people never “Google” themselves or never hear about people who speak of them. If I had called two shows earlier, I would have used my real name. But I didn’t, and here’s why:

John E Brandenburg was on Richard’s program the night of August 3/4, the show immediately prior to the one I called into. I have both written on this blog about Dr. Brandenburg and his claims and presentation, and I have podcasted about his main thesis, that Mars was nuked.

Back in March of this year, Dr. Brandenburg “presented” his ideas at a science conference. I documented it extensively on this blog because of issues I have of lending legitimacy to fringe ideas by “letting” them into science conferences. It’s a damned if you do, damned if you don’t scenario: If you let them present, they claim legitimacy (as Dr. Brandenburg has done extensively, for in every interview I’ve heard of his on more than 4 radio programs, he cites presentations at science conferences as lending legitimacy to his claims), or if you don’t let them in they claim censorship.

However, despite my documentation of his presentation at the March conference, his recitation of those events contradicts reality. And, his statements of the conference, made just under two weeks apart, contradict themselves.

Here’s Coast to Coast, July 27, 2015:

“I was most recently at the Lunar [and] Planetary Science Conference, the premier conference on planetary science. I presented the paper as a poster paper for two hours. I got a lot of people [who] came up and looked at it. And uh, other planetary scientists, and no one contradicted me. No one said, ‘Oh, you got this wrong,’ or ‘That’s because of this,’ or something like that. Finally, one fellow just said, ‘Did they do it to themselves, or did somebody else do it?’ And I hadn’t even mentioned the term ‘aliens’ or ‘civilization’ at all. But it was obvious to him that something had targeted Mars for absolute destruction.”

Versus Richard’s program, August 4, 2015:

“I went and presented this stuff at the Lunar and Planetary Science Conference in Houston in this March, and I got a lotta– I presented as a poster, they-they let me present it as a poster, and, uh– The best and the brightest, I could tell, came to my poster and argued with me and uh, we went back and forth, and finally nobody had any other explanation for the pattern of data on Mars.”

To me those seem mutually exclusive (either no one contradicted him or said he was wrong, or people argued with him). And it flies in the face of what I documented a few days after the fact, where he set up and was at his “posters” for no more than 15 minutes and only spent half that time actually at his poster and talked to perhaps one dozen random stragglers.

Anyway … In response to that blog post, at the end of June of this year, I was asked by another radio host if I would do a debate with Dr. Brandenburg. Here was my response, in full:

Thank you for your invitation to debate Dr. Brandenburg, live. I am going to have to decline. While I stand by what I wrote and my opinion about his ideas, doing a live debate on this topic is not something that I can do. The reason is subject matter expertise.

For example, if we were to debate about the chronology of the Moon or Mars, especially from impact craters, I’d be all for it because that is my research area. If we were to debate on the “Face” or “Pyramids” on Mars, I could do that reasonably well because it is something that I have heavily researched over the years and know the topic and arguments well (though I know Richard Hoagland’s and Mike Bara’s arguments about it better than John Brandenburg’s). The same goes for Planet X, image analysis, the “true color” of Mars, and some other topics.

However, I am not a spectroscopist. I’m not a nuclear engineer. When I have addressed Dr. Brandenburg’s claims, I have had to do external research for each claim. The same goes for the two e-mail exchanges I have had with him. While I am still confident in my conclusions based on that research and what I know about related subjects (e.g., his implication about the age of Lyot crater and that being one of his favored nuke sites — it doesn’t work with the chronology he needs), this method is not conducive to a live debate, and therefore I decline.

If you are referring specifically to my points about how to behave at a scientific conference and Dr. Brandenburg’s presentation there, there is nothing to debate. What I stated is objective fact, and I have documentation for much of what I stated.

If you would like me for a different program to discuss something I named in the second paragraph or is aligned with my research (http://about.sjrdesign.net), then I’d be happy to discuss it further.

In that response, I clearly laid out that Dr. Brandenburg is not someone I’m comfortable debating live because of the subject matter expertise in that area, versus other things I could debate live. I think that’s pretty clear.

However, in the same interview on Richard Hoagland’s show, starting 1/3 of the way through the second hour, there was this exchange. (The audio is posted here.)

JEB: “I’ve had one, one uh Mars blogger go after me.”

RCH: “Who?”

JEB: “I challenged him– This guy named Stuart Robbins.”

RCH: “Oh! Yes! [grunts/groans]”

JEB: “Well I challenged him for– to a debate–”

RCH: [chair squeaks on floor]

JEB: “He won’t debate me.”

RCH: “He won’t debate you? Now that’s interesting. Because he has challenged uh Bara to a debate. [laughs]”

JEB: “Well. He should cha– he, you know, I– I’m– I’ve challenged him to a debate, he won’t debate me!”

RCH: “Uh, does he say why?

[Either the stream loops, or they just repeated verbatim the last two sentences.]

JEB: “Um. [pause] He-he– he basically told a third party he felt he didn’t have enough expertise.”

RCH: “Wait-wait-wait a minute. He doesn’t have enough expertise, but he can– [during this time, JEB was talking over/under RCH, here’s where JEB started to dominate]”

JEB: “[reconstructed: he has enough expertise to criticize my work] but he doesn’t have enough expertise to– He’s just a [unintelligible] troll.”

RCH: “Well yes, he is a troll. You know– is he–”

JEB: [again, here’s where JEB started to dominate over RCH since they were speaking at the same time] “and I so, anyway so, um–”

RCH: “John, John, hang on. Is this the same Stuart Robbins astronomer who is attached to the New Horizons mission in Boulder, at Southwest Research Institute?”

JEB: “Oh, of course he is!”

RCH: “That’s the guy.”

JEB: “Yes!”

RCH: “He mentioned me and Keith Laney in connection with our Pluto discussions the other morning. Out of all the people in all the gin joints et cetera, [JEB laughs] for some reason he brings up us because we’re discussing arcologies visible– John, you gotta look at these Pluto images! Everything we’ve seen at Cydonia that’s in ruin, horrible ruin, is in such better condition at Pluto, and the images are not the highest res!”

They called me a “troll.” Now let me make it clear, I’m not protesting that term. If what I do is their definition of “troll,” so be it. For the record, before last night, I had never communicated personally with Richard, and John has only initiated contact with me before. And my dictionary’s definition of “troll” with respect to the internet is: “make a deliberately offensive or provocative online posting with the aim of upsetting someone or eliciting an angry response from them.” I’ve never had the aim of upsetting someone with my Exposing PseudoAstronomy work, nor eliciting an angry response, so I don’t think I fit the definition of “troll.” If Richard or John want to play scientist (uh oh, did I just troll?), then they need to recognize when something is aimed at them versus their claims, and they need to know how to take criticism of their ideas and come back with better evidence of those ideas, not just call someone an “idiot,” “hater,” or in this case “troll.”

But besides the name-calling, John completely misrepresented my response to the radio host in terms of why I declined a debate.

So the reason that I used a pseudonym when calling Richard this morning was that I didn’t want him to reject my call because of who I am, nor did I want him to enter the conversation with preconceived ideas. You might disagree with that reasoning. It was also 2AM my time and I was falling asleep. But I stand by using a pseudonym for the reasons explained above.

What I Talked About

Colorado is a one-party consent state, so I can legally post the full audio of my call without worrying about fair use of nearly 14 minutes of a radio broadcast. Here is the audio, in its 4.2 MB “glory.”

My intent was not to really argue with Richard. There was also no real point in going on and saying who I was and I’d like to debate him, that’s incredibly confrontational and I saw no reason for it. Instead, I wanted to ask him about two things specifically:

  1. Why does Richard keep calling things a “model” as opposed to putting his £1 down and saying whether he thinks something or another is true?
  2. Why has Richard not identified (or searched, if he has) his lunar “glass towers” in any imagery other than scanned Apollo photographs or small, JPG’d Chinese photographs of the moon?

Let me explain each …

#1 might seem trivial, and indeed, Richard tried to say exactly what I knew he would say but I didn’t get the chance to be specific: He said that he says “model” because it is a “model based on data” and subject to change based on more data. This is very scientific. And on its face, is the hallmark of someone following the scientific process.

However, as Richard tends to implement it, it is a crutch to fall back on when he is shown to be undeniably wrong. For example, that comet Elenin was a spaceship was a “model” that Richard insisted, based on the “data” at the time, but Richard insisted that it was really true, and he used language such as “undeniable” and “proof.” He’s since generally refused to address it after Elenin broke up. Meanwhile, his latest and “greatest” stuff about archologies on Pluto are also a “model” that he insists is real based on the “data” that he has.

You might be asking where I’m going with this since it seems like he’s doing exactly what I said should be done. This is subtle, so stick with me (and you may disagree). A scientist will say that they have built a model based on the data, and they think it’s true because there is not contradictory data. As soon as some comes up, they change their model. Richard, on the other hand, seems to use the term “model” to mean “Absolute Fact” when he comes up with it and fervently insists it’s real (using additional words like “prove” and “undeniable”) – despite issues raised by other people about it – but then when it turns out to be false based on overwhelming evidence against it, he’ll explain it away by saying, “that was just a model, a scenario.”

You simply can’t have it both ways, but Richard seems to try.

#2. Moving on, the second point is something Expat has written more about than I, but I addressed in a very extensive blog post a year ago, “Is Camera Noise Evidence for Ancient Advanced Civilization on the Moon?” Unfortunately, at 2:20AM, I said “JPEG artifacts” instead of “camera noise” which I’m kicking myself for now.

But here was the point I was trying to get across: Inconsistency. Richard claims there are glass towers on the moon. His evidence A is Apollo photographs of the lunar sky that were in an album of Ken Johnston for decades and then he scanned at home. His evidence B is the Chinese images that I linked to in the blog post in the previous paragraph.

The question I was trying to get across is that he has these two missions’ data, but that the anomalies he’s seeing could be fairly easily explained by something mundane: Dirt on the photos or scanner for Apollo, and detector noise, optical effects, and compression artifacts for the Chinese images.

It’s not possible today to get literally original images of Apollo, they are stored in vaults that ain’t no one touchin’. The Chinese space program – like most government things in China, is very closed, and the at least claimed original, raw images from the spacecraft are not available in any public archive I’ve found.

So my attempted question was simple: Has he seen these features in ANY of the OTHER space missions’ digital images that you can get in at least what is claimed as original, raw format? E.g., any from Clementine, Lunar Prospector, Lunar Reconnaissance Orbiter, Kaguya, Chandrayaan-1, etc.?

Once I finally was able to sort of get the question out in mangled form (more on that in the next section of this post), Richard’s response was, how do we know that those official raw images are really real and unaltered? You can just have a computer do a levels clip to remove the glass towers.

But that’s where the inconsistency is: It appears as though Richard is arguing that official images that show what he wants them to show are real and original, but those that don’t show what he wants them to show are altered. It’s a tautology, a circular argument:

  1. How do you know if those features are real?
  2. If they are on an official image, does the image show those features?
  3. If not, then the image has been faked. If the image shows those features, then the image is real. Therefore, since the image is real, the features are real.

Or something very close to that. In other words, you can’t use the premise that the only real, unaltered images are ones that show your features of interest as the criteria for whether your features of interest are real. It’s also highly suspicious that the only images that Richard says he sees his features in are ones that really are more simply explained by some other process, rather than those images that scientists would actually use from other spacecraft.

Or, perhaps it’s the assumed major premise fallacy. Regardless, hopefully you have gotten my point, and it’s what I was trying to get across in my call.

What Did I Learn?

From listening to over two decades of Richard’s interviews, I knew the basics of what to expect, that Richard would (1) allow me very little time to speak, and (2) tend to go on unrelated tangents. I thought I was prepared.

If you listen to the audio, I encourage you to time how long I spoke versus Richard. I also encourage you to count how many times I attempted to ask my second question, and how many times Richard went on a tangent.

So one thing I learned is that I canNOT – even if offered – debate Richard on his own program without a fair moderator. Even when Richard is hosting a normal show with a single guest, Richard spends at least an equal time talking as the guest, if not more. That’s untenable in a debate, to be both a debater and the host. Let’s put it this way: He’s so passionate about his claims that he has demonstrated an inability to self-moderate and keep himself on-topic and to a time limit.

Another thing I learned was that if Richard wants to tell a story, he will tell it, regardless of what you’re trying to ask. Seriously, listen to the audio. Then see the above paragraph. I don’t think I’m being unfair in this statement.

This makes the third thing I learned, that it is very, VERY difficult to ask a question that’s longer than one sentence. Because I kept trying to set up my second question by giving the preamble that people have found holes with his Apollo and Chinese images (background) that he should look to images that are unambiguous with his critics (question/statement), he kept jumping on to try to explain tangents related to the background statement that really didn’t have anything to do with my question.

This is yet more reason why any debate would need to be very, very structured. Not only with an independent moderator, but also with topics prepared ahead of time such that the moderator would keep the debaters to them. Even when I made the side-comment about much of the Apollo photographs referenced by conspiracists being film positives rather than negatives, Richard went on a roughly 2-minute tangent (guessing here, I haven’t re-listened to time it). Those tangents add up and really don’t add anything to the conversation.

Another thing I learned is that Richard will use semantics to explain something or make a point, regardless of its validity. For example, “model.” For another example, when I was trying to ask my second question for the Nth time, Richard said that his critics are “idiots” who think that his glass structures on the moon that he sees in Apollo images could be dirt on the photos or scanner. I said that they have an “explanation” for it, and Richard said they didn’t. I said that’s semantics — they do have an actual explanation, he just may disagree with it, and it may be valid or invalid, but they do have an explanation. Richard again said that was wrong, and that he wasn’t playing semantics. He was. According to my dictionary, “explanation” is “a reason or justification given for an action or belief.” It says nothing about that being a valid action or belief.

Final Thoughts

That’s a lot of text, over 3300 words. And I may add a bit as the day progresses and I think of more things.

I’m not going to go through the call and dissect it bit-by-bit, there’s no real reason for that.

But, there you have it, why I called in (encouraged to do-so), why I used a pseudonym (he called me a troll and I didn’t want that to bias the call), and some of what I learned.

Oh, and add to Lessons Learned: I need to use my good microphone, and I need to have a drink of water next to me. My voice was higher than normal during the call.

April 23, 2015

How Do We Know How Old Stuff Is on the Moon?


Introduction

While this movie is branded under “Exposing PseudoAstronomy” for legal reasons, it has less to do with popular misconceptions/conspiracies/hoaxes and more to do with real science. This is my third more modern, lots of CGI movie, and my second to explain a research paper that I wrote.

In the movie, I go through how the lunar crater chronology is the fundamental basis for how we estimate the ages of surface events across the solar system. I also explain how my work affects the lunar crater chronology and what can be done to better constrain it.

I’m still waiting for a young-Earth creationist to claim that because of a factor of 2 uncertainty, 4.5 billion becomes 6.019 thousand.

I also wrote a blog post about this for The Planetary Society. Because it was posted there over two weeks ago, I think it’s fair game to repost here. You can click on any of the images for larger versions, and all of them are screenshots from the YouTube movie.

Planetary Society Blog Post

Three years ago, I started a project to replicate work done by various groups in the 1970s and 1980s. When the project was completed, the result implied that much of what we think we know about when events happened in the solar system were wrong, needing to be shifted by up to 1 billion years. I presented this in a talk at the recent Lunar and Planetary Science Conference at 8:30 AM, when most people were learning about the latest results from Ceres.

The project started simply enough: I downloaded some of the amazing images taken by NASA’s Lunar Reconnaissance Orbiter’s Wide-Angle Camera (WAC) that showed the Apollo and Luna landing sites. Then, I identified and measured the craters (my dissertation work included creating a massive global crater database of Mars, numbering about 640,000 craters).

The reason to do this is that craters are the only proxy we have for ages on solid surfaces in the solar system. We can determine the relative age of one surface to another (is it older or younger?) by looking at which has more craters: The surface with more craters will be older because, when you assume that craters will form randomly across the body, then the surface with more craters has had more time to accumulate them.

How to Use Craters to Understand Ages

Basic principle behind this work. (Background image © NASA/ASU; composite © S.J. Robbins.)

If we want to use craters for an absolute timeline – as in, actually put numbers on it – then we need some way to tie it to real ages. This was made possible only by the United States’ Apollo and the USSR’s Luna missions that returned rocks from the moon that could be radiometrically dated in labs on Earth.

With these radiometric ages, we then identify the craters on the surface those rocks were gathered and say that a surface with that many craters per unit area is that old.

That’s the lunar crater chronology: The spatial density of craters larger than a standard size versus radiometric age (we use 1 km as that standard size). This crater chronology is then scaled and used as a basis for the chronology across the rest of the solar system. When you hear someone say that something on the surface of Mars is X number of years old, chances are that’s based on the lunar samples from the 1960s and 70s and the crater counting done 40 years ago.

Apollo 15 Landing Site

Example landing site area, Apollo 15 (yellow star). Blue outlined areas indicate regions on which craters were identified, blue shaded areas were removed because they are a different type of impact crater, and blue circles are the craters mapped and measured. (Background image © NASA/ASU; data and composite © S.J. Robbins.)

And, that’s where my project came in. While the rock samples have continued to be analyzed over the decades, the craters were not. It’s easy to assume that the researchers back then did a great job, but by the same token, science is about replication and re-testing and we have developed new ways of doing things in the crater community since the Apollo era. A simple example is that the crater chronology requires a spatial density, and therefore you need to know the area of the surface on which you have identified craters. Over the past 40 years, we have better understood the shape of the moon and now have computers to allow for much more precise area calculations. This can result in changes by 10s of percent in some cases.

When I had finished my reanalysis, my results differed for many of the landing sites, in some cases by a factor of 2 from what the standard is in the field. I was surprised. I checked my work and couldn’t find any mistakes. So, I combed through the literature and looked to see what other people had published. I ended up finding a range of values, and only in one case was my result at the extreme low or high of all the published results. I showed my work to colleagues and none of them could find any issue with it. So, eventually I published it, early last year.

The Lunar Crater Chronologies

The new (blue) and old (red) chronologies and the data used to fit the model. The vertical axis shows the spatial density of impact craters larger than or equal to 1 km in diameter, and the horizontal axis shows the age of the surface from radiometric dating of collected rock samples. (© S.J. Robbins)

When I fit my crater data to the radiometric ages, my fit function showed a difference with the standard that has been used for three decades: Surfaces assigned a model age of about 3.5 to 3.7 billion years under the old chronology were older, by up to 200 million years. And, surfaces younger than about 3.4 billion years under the old chronology are younger, by up to about 1 billion years.

Differences Between the Lunar Crater Chronologies

The new and old chronologies in blue and red (top), and the difference between them in terms of model surface age. (© S.J. Robbins)

There are a lot of implications for this. One is that volcanism on the terrestrial planets may have extended to more recent times. This would imply that the planets’ cores stayed warmer longer. Another implication is that the large reservoirs of water thought to exist around 3 billion years ago may have existed for another 500 million years, with implications then for favorable environments for life.

But, something that I added near the end of my LPSC talk was the question, “Am I right?” The answer is an unsatisfying, “I don’t know.” I of course would not have published it if I thought I was wrong. But by the same token, this type of science is not about one person being right and another being wrong. It’s about developing a model to fit the data and for that model to be successively improved as it gets incrementally closer to explaining reality.

And, there are ways to improve the lunar chronology. One that I’m a big advocate of is more lunar exploration: We need more data, more samples gathered from known locations on the moon’s surface. We can then date those samples – either in situ or in labs on Earth – and along with crater measurements add more tie points to the lunar crater chronology function. Right now, there is a glaring gap in the sample collection, one that spans 2 to 3 billion years of lunar history. A single point in there could help differentiate between my model and the classic model. And more data would be even better.

Until we land robotic missions to send back samples from other planets or that can date samples there, the moon is still our key to ages across the solar system.

March 22, 2015

Should NASA Fund Old Missions In Operation, or New Missions in Development?


Introduction

This was my seventh post to the JREF’s Swift blog, published last week. I wrote it while I was at the annual Lunar and Planetary Science Conference (LPSC) and was reading the news and listening to the (perpetual) budget issues at NASA.

The Post

Last week, NASA Administrator Charles Bolden testified before the Senate Subcommittee responsible for NASA’s budget. In response to questions about the funding of Mars rover missions, The Planetary Society blog reported that Bolden stated the following:

“We cannot continue to operate instruments and missions whose time has passed, because I won’t be able to put something like InSight on Mars in 2016 … I have to make choices.”

This is an interesting statement and sentiment, and it’s one that I’ve wrestled with myself for several years. The question really boils down to this: Should NASA continue to fund proven missions well past their design lifetime that are still successfully operating, or should they “pull the plug” and move the funding (that they never originally budgeted for in the first place) to some other project, one that uses technology a decade newer? And, to make it more relevant to the JREF, if funding is pulled, will it spark a new conspiracy?

The context of this particular mission is that the Mars Exploration Rovers were twins – Spirit and Opportunity – with nominal lifetimes of 90 days. They landed on Mars a decade ago. Spirit died a few years ago, Opportunity is still functional and returning science information. It has gone through several extended missions, meaning that the money was never originally budgeted to pay for operations (mission control, planning, time on the deep space networks, and of course the scientists). Meaning that the money to fund them now eats into other previously planned programs.

Because the MERs landed on Mars a decade ago, the technology in them is at least a decade and a half old. Think about it: That was before the iPod, before most people had multi-CPU computers, and still well before digital cameras were mainstream. Contrast that with what one has available now to build a new mission, and you start to see some of the issues.

On the one hand, you have a still-operating mission. It’s there. On Mars. Still returning usable data. The cost to build it and launch it and make sure everything is working right is done, paid for, and will never have to be paid for again.

But, on the other hand, the money to keep it going prevents new missions, with better technology, with a new and different goal, from even getting off the ground and having the potential to do new science.

It’s easy to say, “Well, just increase NASA’s budget!” Easy to say, not so easy to get Congress to do. Delays and cost over-runs in both the James Webb Space Telescope and the Mars Curiosity rover both were not made up by Congress and so ate into other parts of the budget, such as basic scientific research funding (what I rely on to put food on the table).

If NASA were to simply “turn off” MER Opportunity, it would not be the first still-functional mission that NASA has effectively killed. There are several in recent times, but perhaps most interesting to me is the Apollo seismic network. The Apollo astronauts on later missions installed and activated seismic stations on the lunar surface to detect moonquakes. No, there are no buildings on the moon that we needed to warn, but rather whenever there was a quake – from something impacting to tides between it and Earth and the sun – the stations would pick it up and scientists on Earth would be able to use the data to slowly build up a picture of the interior of our nearest celestial neighbor. It’s a little like the way an ultrasound works, and it’s earthquake data on our own planet that lets us know about the interior structure of Earth.

When NASA ran out of funding for it after a few years after the Apollo program ended, they shut down the network, despite the fact that it was still returning good, usable data, and with each new quake we learned a little more about the structure of the moon’s interior. A consequence of this – besides a loss to basic scientific research – is that conspiracies about NASA finding the moon is hollow have become widespread among the astronomical pseudoscientific world. The thinking goes that they found it “rang like a bell” (which had more to do with the loosely packed surface material) and therefore either shut down the network so we wouldn’t know it was hollow, or they kept the network going but in secret.

Anyway, that bit of conspiracy aside, this really is a serious issue and serious question of where our monetary priorities should be. Assuming NASA’s budget is static and will not be changed to keep these long-lived missions operational, then what should a good administrator do? Should they keep the proven mission going? Or should they kill it and fund the new mission? Or, should they fund both and pull money from other parts of the budget, like education, or human spaceflight, or basic research?

I have my own opinion on this, but I’ll keep it to myself. I just know I wouldn’t want to be in Charley Bolden’s shoes when he makes that decision and has to not only answer to Congress, but to many scientists who will see their budgets cut, yet again.

Letter to the Editor

After the above post, I got an e-mail:

Stuart, what about the possibility of (for future missions, it’s probably too late to do something like this for Opportunity) turning operations for “expired but still viable” missions over to amateur (or private professional) research groups. After the official funded mission is over, could a bid process be set up to allow such groups (which would have their own private funding) to take over the control, data collection, and analysis from such “defunct” missions? Such a handoff would free NASA’s budget for contemporary / future missions, and also give other groups access to hardware / settings (Mars, for example) that their budgets would certainly not allow for. What are your thoughts in this regard?

Here was my response:

While this seems like a great idea on its face, you run into a lot of legal issues. In particular, ITAR-restricted information. That would put a stop to your scenario right away.

Beyond that, there are broader questions of how open the information would be once the data are gathered by an independent, private company. Though, one could of course argue that the company paid for it, therefore they should have the right to own it.

There are also some communications issues. The Deep Space Network is the only set of antennas that can record signals as faint as those sent by interplanetary craft. That’s a public (inter-governmental) group, so if the DSN brings down the data, are there licensing issues? I don’t know the answer to that, but it strikes me as a potential question.

Finally, you have “parts” of spacecraft that are still important and NASA (or other governments) still use even if they can’t fund all the other “parts.” For example, while MAVEN (around Mars now) has a suite of instruments for studding the atmosphere, they are only funded for one Earth year and must submit an extended mission request to operate beyond that. But even if that request is denied, the craft itself will still be kept active and act as a communications relay. It’s just that the science instruments won’t be collecting and transmitting data, and there won’t be money for scientists to analyze it.

It’s a very … perhaps “annoying” and “frustrating” … situation to be in, but unfortunately the solution isn’t as simple as just selling the craft to someone else.

December 30, 2014

My First Infographic: What Have Our Planetary Space Probes Photographed Since 1970?


Introduction

This has been over two months in the making: I’m finally releasing my first infographic. It’s entitled, “Planets and Major Moons: Distribution of Non-Lander Spacecraft Photos Since 1970.” (Suitable for printing on A-size paper with a bit of top and bottom margin to spare.) The purpose is to show the number of images taken by different space probes of the planets (and major satellites), the percentage of the total images that were for each body, and for each body, the percentage taken by each different spacecraft.

PDF Version of Spacecraft Imagery Infographic (3.5 MB)
PNG Version of Spacecraft Imagery Infographic (4.7 MB)

Number of Images of Planets Taken by Spacecraft Infographic

Number of Images of Planets Taken by Spacecraft Infographic

Development Process

I’ve been wanting to create infographics for awhile. Really good ones are few and far between, especially for astronomy, but the good ones are often amazing works of art. I don’t pretend that this is an amazing work of art, but hopefully it’s not ugly.

To me, the key is to have a lot of information crammed into a small space in an easy-to-understand way that you don’t have to be an expert to interpret. In my work, I deal a lot with multi-dimensional datasets and so already I have to come up with ways of displaying a lot of information in as few figures as possible and yet still make them readable.

The Idea

An idea that I came up with is based on the claim that “NASA hides all its pictures!” (This is often, hypocritically, almost immediately followed up with NASA spacecraft imagery showing claimed UFOs and other pseudoscientific claims.)

And so, I wanted to investigate this: How many images really have been taken and are available publicly, for free, on the internet? After several days of research, I had the results, and I assembled them into the above infographic.

The Numbers

I was surprised by some of the numbers and I was not surprised by others. One thing that did not surprise me was that the outer planets have very few photographs (relatively speaking) of them, while most imagery has focused on Mars and the Moon (fully 86%).

But, I was not prepared for how very few photographs were taken by our early probes to the outer solar system. Pioneers 10 and 11 were the first craft to venture out, and yet, because of the (now) archaic method of imaging and slow bandwidth, they collectively took a mere 72 images of both Jupiter and Saturn. Compare that with the ongoing Lunar Reconnaissance Orbiter around the moon, which has publicly released over 1.1 million images.

You can also see the marked effect of the Galileo high-gain antenna failure: Only 7.4% of the photos we have of Jupiter were taken by Galileo, despite it being an orbiter in the 1990s. Compare that with the Cassini orbiter of Saturn, which has returned nearly 50 times as many images, despite no dramatic change in technology between the two craft. This means that only 0.4% of our images of planets and moons are of Jupiter, while 1.9% are of Saturn.

You can also see the marked success of modern spacecraft and the huge volumes of images that (I repeat) are publicly available. The pie slices in the infographic are color-coded by approximate spacecraft operation era. Well over 90% of all images were taken after 1995, and the current suite of the latest NASA spacecraft (MESSENGER around Mercury, Lunar Reconnaissance Orbiter around the Moon, and Mars Reconnaissance Orbiter around Mars) account for a sizable fraction of the returned data for that body — especially MESSENGER, which accounts for 98.1% of all Mercury images.

What was I most surprised by? The Clementine mission to the moon. It returned and has publicly archived just shy of 1.5 million images of the lunar surface. I expected the Lunar Reconnaissance Orbiter to have surpassed that. And, it still may, as it continues to operate and return data. We shall see.

Why the Conspiracy Theorists Are Wrong

As I said, one of the primary reasons I made this was to investigate the claim by conspiracy theorists that these space agencies hide photographs. The blame rests almost entirely on NASA by most conspiracists’ accounts. This infographic proves them wrong in two significant ways.

First, at least for the Moon, Mars, and Venus, sizable numbers of images have been taken by and publicly released by non-NASA sources. I specifically have data from the European Space Agency (SMART-1, Venus Express, and Mars Express), and Japanese Space Agency (SELENE / Kaguya). While both the Indian and Chinese space agencies have also sent spacecraft to the moon and Mars (Mars for the Indians with the recently-in-orbit “MOM” craft), and Russia has sent craft to Venus, Moon, and Mars, I could not find the public repositories – if they exist – for these missions. Therefore, I could not include them. But, a lack of those two does not affect the overall point, that non-NASA agencies have released photos of these bodies.

Second, as I’ve repeated throughout this post, these are the publicly released images. Not private. Public. To public archives. In the bottom-left corner, I have the sources for all of these numbers. (Please note that they were compiled in late October and may have increased a bit for ongoing missions — I’ll update periodically, as necessary.)

The total number of lunar images? About 3 million.

Mars? Around 1.6 million. Venus? Over 350,000. Mercury? Over 210,000.

It’s hard to claim that NASA hides lots of images when these numbers are staring you in the face.

What Conspiracists Could Still Claim

I think the only “out” at this point, given this information (and if they acknowledge this information), is for conspiracists to claim that NASA and other space agencies simply obfuscate the “interesting” stuff. I suppose that’s possible, though they’d need armies of people to do it on the millions of returned images. And they apparently do a pretty bad job considering all the images that conspiracists post, claiming that features within them are of alien-origin.

It’s amazing how the “powers that be” are so powerful, and yet so sloppy. Apparently.

What This Infographic Does Not Show

I had to decide to clip a lot of information. We’ve imaged a lot of asteroids and a lot of comets. Those are out. We have had landers on the three closest bodies (Moon, Mars, Venus). Those images were not included.

Also, I focused on visible-light images, mostly. There are some instruments that take more UV images, or far-IR images, or various other wavelengths, but this infographic focused on the visible or near-visible light camera data.

Pretty much the only exception to this is for the Magellan mission at Venus, which took radar swaths of the planet to “image” the surface. I included this because, in early test audiences, I did not have Venus at all, and they requested it. Then, I did not include Magellan, but the test audiences wondered what happened to it. Describing why that data was not present made things wordy and more cluttered, so I, in the end, simply included it and put a footnote explaining the Magellan data.

This also fails to show the volume of data as measured by or approximated by (for the older craft) pixel count. If I were doing this by amount of pixels returned, the Moon and Mars would be far larger in comparison, and the Lunar Reconnaissance Orbiter and Mars Reconnaissance Orbiter would be much larger fractions of their respective bodies.

Final Thoughts

I’m releasing this under the Creative Commons license with attribution required, non-commercial distribution, and no derivative works (please see the CC stamp at the bottom of the infographic). This is so that I can at least have some semblance of version control (see release date at lower right).

I hope you find it useful and interesting. And at least somewhat purdy. If you like it, share it.

« Previous PageNext Page »

Blog at WordPress.com.