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20130119

Knowing is half the battle

Click for big. I'm wrapping up our exploration of the Solar System's moons, and so I give you REDSHIRTS TOP TEN MOONS OF THE SOLAR SYSTEM!

Based on coolness/interest/possible exploration potential.
10. Mimas - Death Star moon, y'all. Also reminds me of Mimosas, which I've only had like twice in my life, but gosh do I love the word.
9. Phobos - interesting example of captured asteroid, and will serve as an ideal staging base for trips down to Mars.
8. Triton - a captured planet, the other moon with an atmosphere and cyrovolcanoes
7.Ganymede - the biggest, but kinda boring.
6. Io - HELLFIRE!
5. Luna - boring, but we're married, and we love her so.
4. Enceladus - so much coolness
3. Europa - More water here than on Earth - by many factors. Probably home to weird ass alien whales too. We'll find out eventually.
2. Titan - just so exotic yet familiar. It's Earth, if you replaced oxygen with methane and lowered the temperature by 200 degrees C.
1. Calisto! - Big moon, with ice sitting on the surface, right at the edge of the asteroid belt, and out of the radiation field of Jupiter. It's got it all for a future truck stop.

For bonus reference:

Coda 1: Many moons ago, as they say, there was a dust up here on ye olde Redshirt's Lament about the perception that the moon seems bigger when rising/setting than when directly overhead. The common answer to this is it's an optical illusion, caused by the brain comparing objects on the horizon, whereas there is no such comparison available when it's high overhead. And while this is no doubt correct, it's not 100% correct. Witness:
Luna is not in a perfect orbit, and thus it is closer to us at some times. This closeness does translate to a perceived size difference, shown here. Also, more controversially:
From the ISS. You can see the changes in shape as the moon rises above the distorting affects of the atmosphere. Close up:
Also from the ISS. Conclusive proof the atmosphere does change the way we see Luna, stretching it out, making it seem bigger. So take that! Bonus Luna pic:
I knew the sun could show a "green flash" when setting, under certain conditions. I was unaware Luna could do the same - but here it is. All green flashy.

And now you know.

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