Researchers believe the “quasi-satellite” has accompanied Earth since 1957.

Here's how to see the celestial pairing.

A new study suggests lunar soil contains elements that solar wind transported to the moon from Earth’s atmosphere, solving a ...

What can you see when you look up?

Look to the west-southwest after dark on Thursday, Jan. 22, to see a 17%-lit waxing crescent moon moving close to the ringed ...

We now have direct images of two supermassive black holes: M87* and Sag A*. The fact that we can capture such images is ...

The U.S. is the only country to have ever sent humans to the moon.

For months, Saturn has been a steady presence in the sky after sunset, but after tonight, it will move away from our view for ...

Crystals hidden in Australia’s oldest rocks have revealed new clues about how Earth and the Moon formed. The study suggests ...

That would make it thousands of times more massive than any moon orbiting a solar system plane  — so massive it could make ...