Gerard Kuiper, Dutch-American astronomer and academic (died 1973)

Netherlands-born American astronomer (1905–1973)

Gerard Peter Kuiper was a Dutch-American astronomer, planetary scientist, selenographer, author and professor. The Kuiper belt is named after him.

Day of the year

December 7 is the 341st day of the year in the Gregorian calendar; 24 days remain until the end of the year.

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