What we know so far...

-black holes are where there's a HUGE amount of mass in a very small area

-Even light can't escape black holes

-most black holes are about the size of large stars

-scientists assume there are black holes in the middle of every galaxy because there's one inthe middle of ours.

-black holes can form in many different ways

-one type of black hole is the stellar black hole

-astronauts think that stellar black holes can only hold as much mass as about 10 of our suns. but however they have found 1 stellar black hole with 15.65 times as much as our sun

-a black hole forms when an extremely massive star explodes