There’s a good chance that the average person on the street knows what a black hole is – or at least, the very basics. White holes are more of a lesser-known mystery, but scientists are ...

While black holes suck in light, white holes gush light outward. Objects cannot avoid being pulled to the center of a black hole, but would not be able to reach the center of a white hole.

The striking photo of the black hole at the center of the M87 galaxy 55 million light-years from Earth thrilled scientists around the world. Related: White holes: What we know about black holes ...