Belinda Smith

As usual, we've got so many great questions, so we're going to try and get through as many as possible before we wind this up.

So this is from Peter, and he asks, the Artemis astronauts were in space for 10 days.

Because they were travelling quite fast both towards and away from us here on Earth,

their clock will be different to ours due to special relativity.

Also, because they've been further up Earth's gravity well, their clocks will be different due to general relativity.

How much difference will there be due to each component?

Okay, so just unpacking this a bit, the clock on Apollo 12 after their mission would have been 560 microseconds ahead of the clock that remained on Earth.

Okay, let's go from crazy mind-bending physics to a slightly simpler question.

So this is from Amelie, who's five, and she wants to know why she can see the moon during the day even when the sun is out.

And she's been enjoying imagining the four Artemis astronauts flying through space back to Earth.

So while we need the sun to have daytime, the moon can be in the sky at any time of the day or night.

Yeah, it's not just a night object and we love that about it.

A question here from Beck who asks, how come we can't see the space junk satellites and space station in the pictures the crew are taking of Earth?

And even though there's a lot of satellites, they're small.

Yeah.

Now a question from Killian, who's aged eight, and he asks, why did they bother building Artemis when they already had the Saturn V rocket?

And also the Space Launch System is lighter and it produces more thrust, so it's more powerful by weight than what the Saturn V rocket was.

Slightly smaller as well.

More bang for your buck.

Okay, and a question now from Robert, and this is a fun one.