White Holes

A white hole is a hypothetical feature of the universe. It is considered the opposite of a black hole. As black holes don’t let anything escape from their surface, white holes are eruptions of matter and energy and nothing can get inside them.

White holes are a possible solution to the laws of general relativity. This law implies that if eternal black holes exist in the universe, then a white hole should also exist. It is a time-reversal of a black hole. They are expected to have gravity, so they attract objects, but anything on a collision course with a white hole would never reach it.
 
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