Exposing PseudoAstronomy

October 17, 2014

Podcast Episode 118: The Big Mars Hoax / The Two Moons Hoax


Two moons in the sky,
One of them is Mars, but it’s
Too weird to be true.

Finally, a new episode is out. As I slowly ease back into a hopefully regular release schedule (back down to 2x/month), I thought I’d tackle a relatively well known claim, but one that I still thought I could add something to. I got the inspiration for the episode while listening to back-episodes of The Reality Check podcast and they covered this topic.

However, as I said, I think I can still add a significant contribution to the topic, in my own unique format. Yes, I debunk it, but I do it by taking you through Kepler’s Laws of planetary motion, the Small Angle approximation, and show how you can easily estimate how large one object will appear relative to another. Then apply that to Mars.

I also go into a bit of history of the claim, and unlike many that I address on this blog and in the podcast, I don’t think there’s any malice to the people who promote the claim each year. My own Great Aunt Ester thought it was true and sent it to me back in 2009.

As I explain at the end of the episode, I’m still very busy these days, but the amount of busicity (for that neologism, pronounce it as “bizz-I-city” where the “I” is pronounced as the “i” in “it”) has fallen. So, we’ll see how things pan out over the next few weeks. I’m busily listening to old C2C episodes to get material for the Norway Spiral episode, promised at least 3 months ago.

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