Astronomers have recently discovered a number of galaxies made almost entirely of dark matter. Today’s astrobite takes a closer look at one of them.
The largest structures of the universe lie within.
That’s quite a sonic boom, particularly given that the speed of sound in the hot plasma is around 2 million miles per hour!
The author revisits a seminal article that reviews our understanding of AGN feedback, and comes out extremely impressed with the status quo (and the parallels with fictional universes).
This article explores the utility of galaxy clusters as a probe for precision cosmology, by reviewing some of the seminal literature in the field. Somewhere along the way, a symphony is heard.
Omega Centauri is a huge globular cluster, so much so that some astronomers think it could be the remnant of a disrupted dwarf galaxy. We will see that this is not necessarily true.