After a long blog break, here is my new SciLogs post. I'm writing about the vast rotating disc of satellite galaxies around Andromeda. Most of the current news articles on this topic emphasize how surprising, unexpected and mysterious the structure is. This is why I decided to discuss the interpretation in a bit more detail: a promising explanation is already available and should be considered.
With this post we are also moving our "The Dark Matter Crisis" blog from scilogs.eu
. Pavel and I would very much appreciate it if you could support our move by sharing this new link.