Same ol’ same ol’? Galaxy Clusters across Cosmic Time
X-ray studies of galaxy clusters tell us how the extremely hot gas is distributed within these gigantic structures. Looking at these clusters across different redshifts, what does one find?
The largest, ugliest duckling in the universe.
So much of our universe is stunningly beautiful. Let’s spend a little time on something that isn’t, and follow the journey from stunning spiral galaxies to plain old giant ellipticals.
Supermassive Black Holes Tango in a Distant Quasar
Supermassive black holes are among the most exciting objects in the universe. Even more so, when they dance around each other after the merger of two galaxies.
Bulges are red, disks are blue…
…or are they? The color-mass diagram for galaxies can tell us a lot about galaxy evolution, and today’s paper reports what this diagram looks like at high redshifts.
The Milky Way – Tearing Apart Friendships for Billions of Years
Do the Milky Way’s satellite galaxies have their own satellites?
Tidal Tails Tell Two Tales
Merging or interacting galaxies can form streams of gas and new star formation called tidal tails. Today’s paper explores the possibility that older stars from the original galaxies may also be pulled along into these streams.