Black holes are at the center of every galaxy. they also have massive gravitational pull. there are billions of block holes out there in space and each one has the power to create its own galaxy by sucking in debris and other space junk.over time this will create a galaxy. black holes are often refered to in science fiction because light and time have strange properties near them. black holes are very interesting and im going to type a few paragraphs about them.
Black holes were first proposed in the 18th century and they were named "black holes" by John Archibald who was an astronomer. the name has stuck and it even has become a common name in the scientific community. they are often the aftermath of a star dying and falling in on itself. they are "black" because they trap light in itself.
All the matter in a black hole is squeezed into a infantecimally (spelling :< ) small area of volume so no a black hole is not very big, but its weight is very vast. Its size is about a marble but that marble has the mass of about the mass of the earth. the black hole creates almost a stellar whirlwind as it sucks in all the stuff out there and that can be huge. Black holes are very very big and facinating and very real.
