Question: what are black holes

Sarah-Jane Walsh answered on 26 Jun 2013:

The place where all my money disappear in my pockets!

But in all seriousness a black hole occurs when an event, such as a star dying, causes matter to be squeezed in to a small space. This causes the gravitational force to be so huge it sucks everything in even light! That’s where a black hole gets its name because all the light is sucked in so quick its no longer visible meaning it looks completely black.

Black holes can be very small but super dense due to the compactness of all the atoms inside of it. The biggest black holes can be as dense as a million suns. Scientists have found that one supermassive black hole is in the center of ever galaxy, even our own! The black hole in the center of the milky way is called Sagittarius and our own solar system currently orbits it, but we are not being sucked in!