A century ago, Edwin Hubble unveiled a groundbreaking discovery that revolutionized humanity’s understanding of the cosmos.

Look up! Six planets grace the sky this month in what’s known as a "planetary parade," and most will be able to be seen with ...

The result is an impressive panorama, revealing approximately 200 million stars and extending six times the apparent diameter ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

According to astronomy, when you wish upon a star you’re a million years too late. The star is dead, just like your dreams. When you wish upon a star, Jiminy Cricket told us, your dreams come true.

Astronomers have completed a stunning massive photomosaic of our closest celestial neighbor, the Andromeda galaxy, comprised ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

After a close look with a powerful radio telescope, astronomers are still puzzled by a pair of objects with strange ...

Winter skies can be the clearest of the year and the richest in stars. Here are some of the constellations and planets to ...

Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

The night sky has always played a crucial role in navigation, from early ocean crossings to modern GPS. Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with ...