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

Giant radio galaxies (GRGs) are massive, with plasma jets powered by supermassive black holes at their centers, stretching ...

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

Astronomers have discovered an extraordinary new giant radio galaxy with plasma jets 32 times the size of our Milky Way. Measuring ... resolution spectral age maps ever made for GRGs.

Observations show Andromeda has a more active star formation history than the Milky Way, potentially due to a past galactic collision. NASA recently released images of the Andromeda galaxy ...

But only one galaxy stands out as the most important nearby stellar island to our Milky Way -- the magnificent Andromeda galaxy (Messier 31). It can be seen with the naked eye on a very clear ...

"It's easy to romanticize Hubble and his discovery of the universe beyond the Milky Way galaxy, but his work really stood on the shoulders of a number of people," said Jeff Rich, an astronomer at ...