Leo A

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What Wikipedia says

Leo A (also known as Leo III) is an irregular galaxy that is part of the Local Group. It lies 2.6 million light-years from Earth, and was discovered by Fritz Zwicky in 1942. The estimated mass of this galaxy is (8.0 ± 2.7) × 107 solar masses, with at least 80% consisting of dark matter.

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

Image: en:NASA, en:STScI, en:WikiSky, Public domain, via Wikimedia Commons.