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Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

The moon is awesome and super cool, and it rocks! In two ways, in fact. Both because it IS rocks (bet you didn't see that pun coming) and because its slightly-elliptical orbit gives it an apparent rocking motion over the course of a month when seen from Earth, called libration.



Share your favorite MOON FACTS in this thread! (Do YOU have a moon? Why or why not?)

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Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

One of the Apollo astronauts had a mild heart attack while orbiting the Moon. (Even the Earth can't claim any orbital heart attack victims!)

Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

cuntman.net posted:

wrong. its green cheese

As demonstrated in this Apollo astronaut video footage:

Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

Greggster posted:

Would it even be possible to mine He3 with our current technology (let's for arguments sake just say that money is not a problem whatsoever)?

We could certainly (if money was no object) collect and send back at least small quantities of Helium-3, painstakingly concentrated from the lunar regolith.

The bigger problem is that so far we haven't invented any fusion reactors in which to burn it.

Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

FACT: The Moon smells like burned gunpowder.

When the Apollo moonwalkers came back inside the ship and took off their spacesuit helmets, they all noticed the scent of the moon dust they'd tracked in. Most astronauts thought it smelled like gunpowder; a few thought it smelled more like charcoal, or "fireplace ashes sprinkled with water". In any case, it smells burned. It's speculated that this is because of various compounds in the regolith being exposed to oxygen for the first time ever, and undergoing a reaction that smells a bit like the result of a fire (which is just an energetic oxidation, after all).

Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

Yes. (Just be careful of abrasion, some of those rocks are pointy.)
Yes in theory, but only after extensive orthodontia.
None. YOLO.

Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

FACT: The most recent spaceship to visit the Moon did so just a few months ago. China's Chang'e 5 probe landed on the lunar surface in December 2020:


(Huge version of this image)

Then it scooped up some dirt samples, drilling as far as two meters down for them:



Then it blasted back off. Its reentry capsule returned to Earth a few days later:

Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

Foxfire_ posted:

That's neat and all, but why didn't they do important science like figuring out if lens caps have the same properties on the Moon as on Earth instead?

We know something of their properties on Venus, at least -- one of the old Soviet landers once managed to eject its lens cap exactly onto the only spot where its robot arm (for testing soil compressibility) could go.

It turns out lens caps have very similar compressibility in space as they do on earth.

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Powered Descent
Jul 13, 2008

We haven't had that spirit here since 1969.

Lawman 0 posted:

In all honesty moon dust is nasty as gently caress and will probably give unlucky moon base crews silicosis.

Actual lung damage would be a pretty extreme case, but yeah, moon dust is going to be a pain to deal with. Mars dust may present problems too.

A really promising idea to keep from tracking that poo poo into your nice clean ship is a concept called Suitport that the folks at NASA have been working on for a while. Instead of bringing your whole spacesuit inside with you, you "dock" the backpack part to a port on your ship/rover/base/whatever, swing the back open on a big hinge, and shimmy your way out through the back of the suit, leaving the filthy exterior of the suit outside. When you're going out again, just slide back into the suit, shut the backpack hatch and stroll off.



It's still new and experimental, but with some more development it can probably be made to be faster and easier than a traditional airlock, and with less losses of your atmosphere gases. And you even get to have your empty spacesuits standing guard outside like big spooky gargoyles. :ghost:

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