Nigel Goes to Space
Join Nigel as he takes you on his journey to the stars and beyond!
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Nigel is an internationally acclaimed science populariser and author, specialising in astronomy and space. In this video he responds to a question from Willow Roberts.
What is a white hole?
In general relativity, a white hole is a hypothetical region of spacetime which cannot be entered from the outside, although matter and light can escape from it. A place you can leave but never go back. In this sense, it is the reverse of a black hole, which can only be entered from the outside and from which matter and light cannot escape.