Almost 10 years ago, a NASA spacecraft was able to take several photos of Pluto, known for decades as a planet before it was ...

Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea ...

This colorful image of the Helix nebula may mirror what someday could become of our sun and our home planet. Released on ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Scientists have been receiving X-ray signals from the Helix Nebula for decades, but now they believe it may hide a horrifying ...

For the better part of a century, we believed there were nine planets in our solar system, with Pluto being the farthest from the sun. Since the discovery of more Pluto-sized dwarf planets, that ...

A new image released by NASA shows what could be a captivating — and terrifying — event roughly 650 light-years away: a dying ...

Only the three stars that make up the Alpha Centauri system lie closer to us. The planets newly discovered around Barnard’s ...

So in some sense, alien worlds were not first discovered in the 1990s or even the 1980s. It took nearly a century to fully ...

Last year, astronomers announced that a planet orbits Barnard’s star. Now, researchers have confirmed the existence of three more.