W. M. Keck Observatory

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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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What Wikipedia says

The W. M. Keck Observatory is an astronomical observatory with two telescopes at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii.

Excerpt from the Wikipedia article “W. M. Keck Observatory”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: T. Wynne / JPL, Public domain, via Wikimedia Commons.