Contact binary

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

A contact binary is a small Solar System body, such as a minor planet or comet, that is composed of two bodies that have gravitated toward each other until they touch, resulting in a bilobated, peanut-like overall shape.

Excerpt from the Wikipedia article “Contact binary (small Solar System body)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA/JHUAPL/SwRI/Roman Tkachenko, Public domain, via Wikimedia Commons.