NGC 638

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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What Wikipedia says

NGC 638 is a barred spiral galaxy located in the constellation of Pisces. Its velocity speed to the cosmic microwave background is 2,864± 21 km/s, which corresponds to a Hubble's law of 42.2 ± 3.0 Mpc (~138 million light-year). NGC 638 was discovered by American astronomer Lewis A. Swift in 1886.

Excerpt from the Wikipedia article “NGC 638”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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