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We're learning all about the moon and Mars.

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The moon is a really cool place. There's a lot less gravity there.

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And that's going to make things so much easier to do.

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You think so? You might be surprised how difficult living in an alien environment can be.

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How is that?

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There are a lot of things you might not think of.

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Have you ever gone camping in the mountains?

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That's an alien environment?

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Well, not quite the same thing, but you do have to think a little differently.

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For example, on a 10,000 foot mountain,

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the air pressure is low and water boils at 90 degrees Celsius instead of 100 degrees.

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So food doesn't cook as quickly.

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Oh, I get it.

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So on the moon where there isn't any atmosphere,

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the water would boil at an even lower temperature.

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Wait a minute.

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If there isn't any atmosphere, then we would have to bring our own oxygen supply.

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Actually, you couldn't just bring an oxygen mask.

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You would have to have a space suit.

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I have one in my closet.

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Why would you need that?

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A space suit protects you from temperature extremes.

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On the moon, it's about 130 degrees Celsius in the daytime and minus 170 Celsius at night.

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More importantly, because there is no air on the moon,

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your blood wouldn't boil without a space suit.

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Oh, I see you found it.

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Okay, you saw me on the space suit. Is there anything else?

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Well, now you will find that tasks are tougher with a space suit.

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I'll give you a few simple things to do.

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Space suit

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Even easy tasks become difficult.

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Let's try something else.

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And suppose you're on a planet where the gravitational force is very strong.

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For example, you could stand on Jupiter.

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You'd weigh two and a half times your Earth weight.

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Now, I'll cut you some slack and just make you weigh one and a half times your normal weight.

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Thirty pounds.

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And four more here.

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And here.

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Thanks a lot. Now it's really hard to move.

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Imagine living on a world like the moon where it is dark for two weeks at a time and then light for two weeks.

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It would be pretty hard getting used to going to sleep when it's light for that long of a time.

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That would be a lot easier to live with than wearing these weights.

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So what have you learned about Mars?

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Well, I haven't done a lot of research on Mars yet.

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Why don't you go see Dr. Bobby Braun with NASA Langley Research Center.

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He's done a lot of research on Mars.

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Thanks, Dr. D. That's where I'm headed next.

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See you later, guys.