In the heart of our Milky Way galaxy, two gigantic "bubbles" extend roughly 50,000 light-years above and below the galactic ...

Using the Gemini North telescope, astronomers have detected the largest black hole jet ever seen in the early universe. It's ...

Recent studies challenge the long-held belief that the Milky Way is a standard model for understanding galaxy formation, ...

So how well do you know the Milky Way? Let's test your knowledge of our galaxy's size, age, speed and more with the 15 questions below. Remember to log in to put your name on the leaderboard and ...

The Andromeda galaxy helped Edwin Hubble settle a great debate in astronomy. Stocktrek Images via Getty Images ...

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

It seemed that these redshifted galaxies were all moving away from the Milky Way. Hubble’s results suggested the farther away a galaxy was, the faster it was moving away from Earth. Hubble got ...

After 11 years in solar orbit, the European Space Agency’s Gaia spacecraft has completed its mapping of our Milky Way Galaxy to a precision never before achieved. Surviving solar radiation and ...

A recent NASA report suggests that countless tiny particles could be coming together to create an invisible, foam-like dark ...