circumgalactic medium
The True Size of Galaxies is Much Larger Than We Thought
Ask most people what a galaxy is made up of, and they'll say it's made of stars. Our own galaxy,…
4 months ago
Galaxies Breathe Gas, and When They Stop, No More Stars Form
For most of the history of astronomy, all we could see were stars. We could see them individually, in clusters,…
1 year ago
Hubble Shows the True Size of Andromeda
It's possible that you've seen the Andromeda galaxy (M31) without even realizing it. The massive spiral galaxy appears as a…
4 years ago