Because the Moon is over a quarter the diameter of Earth, the Earth-Moon system is often cited as the pairing in our Solar ...

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

After a square structure found on the surface of Mars went viral on social media, internet users brought up another Martian ...

Five of the brightest planets will be visible to the naked eye. With help, you may even spot Uranus and Neptune.