Binary system

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

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

A binary system is a system of two astronomical bodies of the same kind that are comparable in size. Definitions vary, but typically require the center of mass to be located outside of either object. (See animated examples.)

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

Image: Stephanie Hoover, CC0, via Wikimedia Commons.