Black holes are everywhere! As far as astronomers can tell, there are probably millions of black holes in our Milky Way Galaxy alone. That may sound like a lot, but the nearest one discovered is still 1600 light years away— a pretty fair distance, about 16 quadrillion kilometers! That’s certainly too far away to affect us. The giant black hole in the center of the Galaxy is even farther away: at a distance of 30,000 light years, we’re in no danger of being sucked in to the vortex. For a black hole to be dangerous, it would have to be very close, probably less than a light year away. Not only are there no black holes that close, there aren’t any known that will ever get that close. So don’t fret too much over.