Astronomers discovered a new moon of Uranus and hundreds of moons around Saturn over the past year, and there may be many ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

The newly identified cluster of Kuiper Belt objects lies about 4 billion miles from the Sun, offering fresh clues about how ...

Imagine never being able to dream of landing on Mars or traveling to Saturn. Not because it's impossible to get there, but ...

There could be a ninth planet in our solar system that's lying in wait to be discovered - and no, it's not Pluto. Our solar ...

Astronomers using NASA's Hubble Space Telescope have imaged the largest protoplanetary disk ever observed circling a young ...

Early Mars seems to have had a protective atmosphere and liquid water in the form of oceans, rivers, and lakes. It may also ...

Everything that has a beginning will have an end. From organisms to planets, the arc remains the same for all parts of the ...

Kicking off the year’s cosmic wonders is the moon, drawing the first astronauts to visit in more than 50 years as well as a ...