White hole

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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Science and technology

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What Wikipedia says

In general relativity, a white hole is a hypothetical region of spacetime and singularity that cannot be entered from the outside, although energy, matter, light and information can escape from it. In this sense, it is the opposite of a black hole, from which energy, matter, light and information cannot escape.

Excerpt from the Wikipedia article “White hole”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Baperookamo, CC BY-SA 4.0, via Wikimedia Commons.