In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

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 ...

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

A research team may have discovered a star with an exoplanet that is so fast that both will leave the Milky Way.

Astronomers may have discovered a scrawny star bolting through the middle of our galaxy with a planet in tow. If confirmed, ...

Astronomers have spied a monster radio jet in the distant universe that's twice the width of the Milky Way galaxy. The ...

In the 1920s, astronomers thought that the Milky Way was the entire universe. Hubble's discovery revealed a much bigger ...

The Hubble Space Telescope has found evidence of a "wandering" black hole about 5000 light years away in the Milky Way galaxy. Astronomers estimate that there could be 100 million black holes ...

LEDA 1313424, aptly nicknamed the Bullseye, is two and a half times the size of our Milky Way and has ... Yale University in New Haven, Connecticut, in a statement. "I was looking at a ground-based ...