We've known for over 30 years that there are other stellar systems in our galaxy, but we don't have any idea how many there ...

A century ago, Edwin Hubble revolutionized our understanding of the universe by proving that the Milky Way is just one of many galaxies in an ever-expanding cosmos. This breakthrough led to the ...

On April evenings, look to the west to spot the bright winter constellations of Orion, Gemini, Taurus, Auriga, Canis Major and Canis Minor. They’ll be gone soon, so check them out while you can.

At the start of March, Mercury and Venus lay in the west after sunset. Now both have passed between us and the Sun into the ...

Explore the four galactic quadrants of the Milky Way and find out which one contains Earth, from scientific facts to sci-fi lore like Star Trek.

Europe's Gaia space telescope was powered down and sent into "retirement" on Thursday after a decade revealing the secrets of ...

The final messages sent to Gaia will continue to be carried out into space as the observatory sleeps, and as data from it ...

After more than a decade of mapping the stars, the European spacecraft was shut down on Thursday. But its legacy lives on.

The Orion Nebula — where young stars are being actively born — serves as a natural laboratory for uncovering the secrets ...

Explore Earth and its relationships with a plethora of planets, stars and galaxies in its cosmic family, Laniakea, the ...

Discovered by Charles Messier in 1764, M20 is a star-forming nebula located 9,000 light-years away from Earth in the constellation Sagittarius. The Orion Nebula (also known as Messier 42 or NGC 1976) ...

As well as some of the darkest skies on the U.S. East Coast, it's also the nation's southernmost point. At 24.5 degrees north ...