Water is essential for life on Earth and other planets, and scientists have found ample evidence of water in Mars’ early history.

Scientists have discovered stars unexpectedly blasting out radio waves, possibly indicating the existence of hidden planets.

A team of space scientists has published a paper suggesting that there may be an Earth- or Mars-sized planet orbiting beyond Neptune.

Like the speed of an advancing race car driver, the winds in the outermost "lane" of Jupiter's Great Red Spot are accelerating

A rogue planet is an interstellar object of planetary mass without a host planetary system and could be fertile nurseries for life.

The approximately $4 million spacecraft, a smaller-than-usual type of satellite known as a "CubeSat," is as large as a "box of Cheerios".

Earth, Venus and the other planets residing in the inner solar systems were likely born from repeated hit-and-run collisions.

Volcanoes can produce eruptions so powerful they release oceans of dust and toxic gases into the air, blocking out sunlight for decades.

An international team of researchers has generated an entire virtual universe, and made it freely available on the cloud to everyone.

How do we find Earth-like planets outside our solar system? Send a giant structure that blocks starlight so that astronomers can see further

Although thousands of planets have been discovered in the Milky Way, most reside less than a few thousand light years from Earth.

The rise and fall of sunlight reflected off the Moon, as it presents its different faces to us, is known as a "phase curve"

The familiar star at the center of our solar system has had billions of years to mature and ultimately provide life-giving energy to us here

When we search for life out there in the galaxy, we base our efforts on what we know. So far, we know only one planet that has yielded life.

The spacecraft used its infrared instrument during recent flybys of Jupiter's mammoth moon to create this latest map.

A slowdown in the Earth's rotation could have affected the oxygen content of the atmosphere

As missions like NASA’s Hubble Space Telescope, TESS and Kepler continue to provide insights into the properties of exoplanets

A combination of a once-debunked 19th-century identification of a water-carrying iron mineral and the fact that these rocks are extremely...

For years scientists have been debating what might lay under the Martian planet’s south polar cap and initially attributed it to water.

For the first time, astronomers have uncovered evidence of water vapor in the atmosphere of Jupiter's moon Ganymede.