Given what we know about our universe, what is the most massive possible observable galaxy at a given time?
Last year’s discovery of CR7, an intriguing galaxy in the early universe, encouraged many exotic explanations. New observations somewhat spoil the party
Every massive galaxy hosts a supermassive black hole – but how do these cosmic monsters affect the stars they share their galaxy with?
Have we caught a glimpse of some of the earliest black holes in the universe, and what does it mean for our understanding of the early universe?
Biased supermassive black hole samples may compromise well-known black hole-galaxy scaling relations.
This is less a physical question than a moral one. Should we feed a black hole? If we do, will it ever learn to feed and fend for itself independently? Will it ever truly be able to return to the wild, or will it ever after be chained to the yoke of domestic comfort?