• Question: What is a white hole

    Asked by lummy to Arttu, Ceri, James_M, Monica, Philip on 13 Jun 2011.
    • Photo: Arttu Rajantie

      Arttu Rajantie answered on 13 Jun 2011:

      A white hole is the opposite of a black hole, so it is an object that nothing can enter. (A black hole is an object from which nothing can escape, even light.) White holes exist as mathematical objects in general relativity, but they probably don’t really exist in the universe because there does not seem to be any way in which they could actually form.

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