Black holes...

...keep getting more and more interesting.

I'm linking this video rather than embedding it because it haas a strobe effect and I don't want to give anyone seizures:

https://www.youtube.com/watch?v=9V-sjuOzVVA

This is an active black hole in the process of eating a companion star, and look at how black it isn't. (Yes, this is an artists' impression, but black holes generally aren't)...