• Question: What is a white hole?

    Asked by allij021 to Cathal, Daphne, Darren, Jon, Katherine on 15 Mar 2012.
    • Photo: Jon Benton

      Jon Benton answered on 15 Mar 2012:

      A white hole is the hypothetical opposite of a black hole. It can’t be entered from the outside but light and matter can escape it.

      They appear in Einstein’s theory of eternal black holes and that a black hole in the future has a white hole as its past. Some people think that a white hole can create universes from matter pulled in from a black hole however all this is theoretical at the moment.