The moon's orbit isn't a perfect circle. Instead, it's more stretched out, kind of like an oval, which means its distance from Earth varies by about 30,000 miles (48,000 km). The surface of the moon ...

The first words uttered by a human standing on the moon are iconic. But so are the words from the second brazen astronaut. "Beautiful, beautiful. Magnificent desolation," marveled NASA astronaut Buzz ...

The moon is our constant companion and the only natural object that always orbits Earth. It's about four times smaller than Earth and its gravity is much weaker, which is why astronauts bounce around ...