SpaceKids on Space.com

Antimatter sounds like the stuff of science fiction, but it’s very real

Some parts of space are hot!

Temperatures on the moon vary wildly between the lunar day and night.

The orbit of the moon around the Earth is not a perfect circle so the distance varies a little.

Though pictures of the sun sure look fiery, the sun isn't on fire the way you might think.

Stars make their own light, but not planets.

In theory, we could visit the sun. But the trip is long — about 93 million miles one way.

The core of the sun is so hot and there is so much pressure, nuclear fusion takes place.

The moon, or any object, can be measured by diameter or mass.