At the time, the Earth would have been far closer to the moon than it is today, making it perhaps twice as large in the lunar ...

The solar system is our cosmic neighborhood, made up of the sun and everything that orbits it — planets, moons, asteroids, comets, and even dust and gas. The order of the planets in the solar ...

Explore the stunning visual transformations of our familiar planets as they take on the role of Earth's moon. The Hubble ...

Discover the planet that has the most moons. This planet is a ringed giant and the second largest in the solar system.

Earth has four seasons, but do other planets in our solar system also have hot summer days and cold winter nights?

Modern astronomers now have an advanced understanding of many of the objects in the night sky, and have even determined that ...

Discovered in 1930, Pluto was long considered our Solar System's ninth planet, but was unseated in 2006 after the discovery ...

Discovered in 1930, Pluto was long considered our Solar System's ninth planet, but was unseated in 2006 after the discovery ...

A dazzling snapshot from ESO’s Paranal Observatory captures a rare sky parade — the Moon, a comet, and nearly every visible ...

NASA scientists have sought to understand planet Jupiter, the gas giant whose mass is more than the rest of the planets in ...