Exposing PseudoAstronomy

May 2, 2015

Podcast Episode 131 – Clip Show #3: Blood Moons, Ceres’ Bright Spots, MESSENGER’s Death, and Funding in Science Follow-Up


Blood moons, science cash,
And spacecraft conspiracies
Are topics du jour.

Clip Show #3 is a big catch-up on several miscellaneous topics: The latest lunar eclipse, Ceres’ mysterious bright spots, MESSENGER’s death plunge into Mercury, and a large follow-up to episode 126 which was my interview with Dr. Pamela Gay about funding in science. This episode also had a logical fallacy section – cherry picking and anomaly hunting – and a feedback/Q&A about whether NASA has created a Warp Drive, and finally my long-foreshadowed tribute to Leonard Nimoy, with how he or his characters influenced myself and you in some way.

There’s really not too much else to say about this episode. The next one will likely by about Big Bang Denial (along similar lines to episode 125 about Black Hole Denial and a future one about Dark Matter Denial). And, this Friday/Saturday, I should be back on “The Reality Check” podcast discussing exoplanets and that we’ve been on the cusp of detecting an Earth-like planet … for many years.

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.

April 16, 2015

Podcast Episode 130: Dealing with Pseudoscience at Scientific Conferences (and #LPSC2015)


The Iv’ry Tower
Of science: Who can get in,
And who remains out?

Second in the three-part series: Have you ever wondered how decisions are made about who can and who cannot present at a scientific conference? Then listen to this episode! I interviewed Dr. Dave Draper, who chairs the program selection committee for the largest annual planetary science conference in the world. We talked about a lot of things, from the basics on the (incredibly minimal) requirements of submitting a presentation request to how decisions are made. We also discussed a few hypotheticals using real-world examples of pseudoscience that I’ve talked about on the blog and podcast.

The episode, like most of my interviews have been, is nearly an hour long, but I found it an interesting discussion and learned some things, so hopefully you will, too. There were not other segments in this episode, though I did do a follow-up because of what happened to air on Coast to Coast that evening, a mere 12 hours after Dave and I had finished recording, and it led me to disagree with him at least a bit on one point.

The next episode is going to be a bit of a catch-up on things that have been piling up since I started the Hale-Bopp saga back in March. I’ll do a bit of pseudoscience with whether or not the lunar eclipse we had in April was really a full one – and implications for the “Blood Moon” crapola – a lot of feedback including discussion about some points raised by Pamela Gay in episode 130, and the Leonard Nimoy tribute.

February 1, 2015

Podcast Episode 125: The Black Hole Conspiracy


Black holes: Are these dense,
Massive objects for realz, or
Are they just Sci Fi?

This is a bit different from a straight-up old-school “debunking” episode where the emphasis is more on the process of science and process of elimination rather than solid, cannot-be-dismissed evidence for something. That’s because, by definition (we think), black holes cannot be directly observed. That’s why I use a part of a blog post by Mike Bara as a very rough outline to go through some of the theoretical reasons for why we think black holes exist and then some of the observational evidence from material interacting with the theoretical objects.

This episode continues the Logical Fallacies segment and introduces you to the Burden of Proof fallacy. Which is a tricky one. There are also some old stalwarts like Argument from incredulity, argument from ridicule, ad hominem, straw man, and argument from authority.

And, for the first time in what seems like a year, there’s Q&A!!!

I’m still doing my listening “research” for the Hale-Bopp episodes, which is looking like there’s so much material that I may turn it into a three-parter. We’ll see. Hard to say at this point. It’s slated to be the next episode, but I may have to postpone that if I haven’t finished listening in time, and I’ll do a different episode instead. I’m also trying to line up at least two future interviews, but given past experience, I’m loathe to announce them before they’re recorded.

April 24, 2013

Podcast #72: Solar System Mysteries “Solved” by PseudoScience, Part 1 – Iapetus


Exploding planets,
Alien spaceships … Why is
Iapetus weird?

The subject of this episode is Saturn’s moon, Iapetus, and two mysteries about it that various branches of pseudoscience have claimed to solve: the brightness dichotomy via an exploded planet, and the equatorial ridge via a spaceship.

This is the first of what I plan to be a series much like “The Fake Story of Planet X” series — different mysteries of the solar system that have a pseudoscientific explanation and may or may not have a real science (agreed upon) explanation. Let me know what you think of the concept. Future ideas for shows are the Pioneer Anomaly and Mars’ crustal dichotomy.

Otherwise, there’s a bit of feedback and then I get into the puzzler from last time and one announcement.

Well, I sorta snuck in a second announcement — I’m headed to Australia, December 18 – January 20. I’ll be centered in Melbourne (which I enjoy pronouncing as “Mel-born-EE”) for most of the trip though should make it up to Sydney (I wanna see the Great Barrier Reef!). So, dinner in each city if I can round up enough interest. I’m slowly learning that Australia is not just a 5-hr drive across, so I’m less likely to make it to the eastern half. We’ll see if I can increase my Australian listenership in the meantime to make a dinner here or there worth organizing.

April 17, 2013

Podcast #71 – The Fake Story of Planet X, Part 6 – Andy Lloyd’s “Dark Star”


A dark star could save
Sitchen’s Anunnaki claim
But problems it has.

When I upload the RSS feed for the podcast, I have to provide both a “subtitle” (short description) and “description.” I use the “description” from my 3-4 sentence summary I post for every episode. I never know what to put for the other. I’ve decided to start posting haikus related to the episode.

Anywho, this episode is yet another in the Planet X saga. It covers Andy Lloyd’s idea, which is an offshoot of Zecharia Sitchin’s Anunnaki-hosting planet Nibiru from his interpretation of Sumerian tablets. Andy’s major change is to stick the planet around a brown dwarf star. In the episode, I do actual math and show why what he proposes is impossible.

There’s also a puzzler (yay!), new news item, and two announcements. The episode is also a bit longer than normal, coming in at a bit over 37 minutes.

Regarding the second of two announcements — Brian Dunning, the guy who does the Skeptoid podcast, has pled guilty to wire fraud. Based on this material, he is likely facing jail time. I greatly admire his skeptical work and think that clearly still stands on its own, and this does not diminish what he has done for our community.

April 8, 2013

Podcast #70: The Ringmakers of Saturn


The Ringmakers of Saturn, a book by Norman R. Bergrun, presents one of the most “out there” ideas I’ve discussed yet on the podcast. But, it’s still a decent teaching tool, worth briefly talking about.

I also have a Q&A, corrections, and Feedback.

April 1, 2013

Podcast #69: The Solar Neutrino “Problem”


I was all set to do a few other episodes, and I was re-kajiggering the schedule of episodes for the next several months. I realized that – gasp! – I had almost nothing planned picking on young-Earth creationists! And it had been about 20 episodes since I had last done it.

Clearly, I had been neglectful, so this episode deals with one of the more technical but one of my more favorite topics in young-Earth creationism: The Solar Neutrino “Problem.” Listen to the episode, especially towards the end of the main segment, and I think you’ll see why I like it so much.

Otherwise, in this episode we have the solutions to the past two puzzlers, a new puzzler for this one, and three announcements of upcoming talks: Colorado School of Mines on April 12 (Apollo moon hoax), Denver Skepticamp on April 27 (image anomalies), and TAM in mid-July.

February 16, 2013

Podcast #65: José Escamilla’s Movie “Celestial”


A fantasia of pareidolia and misunderstanding image data, the movie “Celestial” gets a quick review on this roughly 24-minute-long episode.

There’s a Q&A, Puzzler (and solution for last time), and even a correction for the last episode and announcement for this one:

The episode for March 16, 2013, should be another interview with the pseudononymous Expat, who was my first interview ever back in Episode 10, for November 1, 2011. Expat will be returning to talk about the many conspiracy theories of Richard C. Hoagland related to politics and some technology at NASA. The reason I’m announcing this so early is that this topic garnered a lot of interest on the Facebook page for the podcast, and so I wanted to let you know early so that if there’s a specific question or topic you’d like me to ask Expat about, you can send it in. You can do that in any of the half-dozen ways there are to get in contact with me.

February 1, 2013

Podcast #63: Clip Show #1


It was bound to happen at some point, that episode that’s just a hodgepodge of short, random bits of crä-crä that I put together as a clip show. This one features five bits of silliness — or maybe six, I lost count. Big-name stars you may remember from other episodes are Brooks Agnew and Gregg Braden, but making their first time appearance we also hear from Christopher Knight and Alan Butler, Ken Parsons, and Jeffrey Grupp. Coast to Coast AM clips feature heavily, so if you don’t like ’em, you may want to skip this episode.

Other segments were Announcements and a Puzzler. You’ll need to go to about 24 minutes into the episode for the puzzler, it’s not in the usual place.

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