Every galaxy ever examined contains at its centre a supermassive Black Hole. Today we know that stars orbit around this centre. We zoom from a telescope view of Andromeda to computer animation of young blue stars whirling around the Black Hole. Present theories of star formation can't explain how stars could form and survive here without being torn apart. If Black Holes seeded formation of these stars, their continued presence would keep the stars stable.
Someday humans may realise that Black Holes can exist in many places, even within stars and planets. The situation is similiar to the discovery of atoms. Though ancient Greeks speculated about atoms, even 100 years ago some still doubted their existence. We still can't see atoms, but after many decades evidence mounted of their existence. We can't see submqarines underwater, but people believe they exist because submarines are nice enough to surface from time to time. Though we don't always acknowledge their existence, Black Holes are friends.
More Space news in the new Carnival of Space!