SpaceKids on Space.com

Four young museumgoers travel back in time to save the future of winged aircraft (and spacecraft, too) in a new comic for young readers released by Smithsonian Books.

Buzz Aldrin set foot on the moon, and his new book encourages kids to take the first steps onto Mars.

Asteroids are space rocks.

Even the smartest scientists in the world don't know what dark matter is. But they know it’s out there.

The planet Mercury looks a little bit like Earth's moon.

Mercury is the closest planet to the sun.

A lot of kids are led to believe this idea.

Our Milky Way galaxy looks like a huge milky haze in the night sky, which is where its name comes from.

The first footprints put on the moon will probably be there a long, long time.

Gravity is everywhere, even in space.