Since there is no air or water in space how did the astronauts get a footprint in the moon/?

Question

We would be quite lighter on the moon than on earth so how?

Answer 1

The lunar dust is extremely fine, like talcum powder; much finer than sand. And the individual grains are jagged, unlike the smooth sand grains on Earth, so they clump together easily even when dry.

And the astronauts are lighter on the Moon than on Earth, but they are still heavy enough, especially wearing those heavy space suits, to make footprints in the dust.

Answer 2

Where, oh where did you get the idea that either air or water is necessary to get a footprint? Ever walked a dusty road? There's plenty of dust on the moon. As for the weight, the moon has gravity. Less than the earth has, but enough to make a footprint. Read a book now and then, okay?

Answer 3

There was still enough gravity to hold the astronauts on the surface and therefore their weight would cause an indention in the loose moon dust. It's got nothing at all to do with lack of air and water, just a matter of pressure. I believe that gravity on the moon is about one sixth of that on earth so assuming that the astronaut was about 14 stones on earth, he would be about 2.5 stones on the moon (plus the weight of his space suit) which is plenty enough to leave a footprint.

Answer 4

What does air and water have to do with footprints? Haven't you ever walked through a dusty old house before?

The moon is covered with a fine layer of dust. When you walk through dry dust, you leave footprints. I don't know why you think that you need either air or water for dirt to form.


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BTW, the moon does have gravity. You weigh about 1/6 of what you would weigh on Earth. The astronauts equipment weighed about 200 lbs on Earth, so it weighed around 33 lbs on the moon, plus the weight of the astronaut.

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the person below me is wrong; there is no air on the moon.

Answer 5

On earth, the combined weight of an Apollo space suit and an astronaut, is something like 360 pounds.

On the moon, that would be about 60 pounds.

So, ask yourself this: Is 60 pounds enough pressure to leave a mark in a thick layer of moon dust? Seems to me like it is.

As far as "air or water," I guess I don't understand what those have to do with footprints.

Answer 6

The surface of the Moon is covered with a fine dust called regolith. This soft material easily took footprints, even though the gravity on the Moon is 1/6 that on Earth.

Answer 7

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Answer 8

The lunar surface is covered with a fine powder called regolith. Even in the moons gravity, which is 16.5% of earths, there is no problem sinking a foot into it. And actually those footprints will last for many many centuries BECAUSE there is no water or air to erode them.

Answer 9

What does air or water have to do with stepping on the moon? The astronauts were wearing space suits, you know. They climbed down the ladder and walked around. How hard is that?

Answer 10

To call the stuff on the moon dust is like calling dust gravel. You have no idea how fine it is. And it isn't the consistency of sand. Think of putting a handprint in flour. As for the lower gravity, we're talking about a fully grow, strong man with half his own weight in equipment. Even at one-sixth G, try lifting him.