How far is the closest Black Hole from Earth? Answer: Astronomers think there is a black hole in the center of our galaxy. Relatively speaking, that is pretty close. But it's far enough away that we aren't in any danger of being sucked in by it. - Answer provided by Ask Dr. Universe Email Question    Print Question

Why is space black and the sky is blue? About 20 miles above the Earth, the sky appears black. So what happens between there and here? Light, you might know,... If you are color-blind does that mean you see things in black and white like those old movies on TV? Eyes are miraculous contraptions! When light goes through the lens at the front of your eye, it travels back to a... What would happen if a comet hit our earth? There are lots of scenarios. Comets have hit the Earth before and caused no major damage. Here is a list of some... What's the fastest animal on Earth? According to the Guinness Book of World Records, peregrine falcons have been known to dive at speeds in excess of 217... What is the slowest animal on Earth? Ever heard someone called a "sloth" or "slow as a sloth" because they move really slowly? That's because the sloth --... What would happen if the earth didn't have gravity? We'd float away into space, I suppose. But think about it: if the Earth didn't have any gravity, that would mean it...