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Picard, Jean

(Encyclopedia) Picard, Jean, 1620–82, French astronomer, noted for having made the first accurate measurement of a degree of the earth's meridian. The figures he established were of great value to…

Shapley, Harlow

(Encyclopedia) Shapley, HarlowShapley, Harlowshăpˈlē [key], 1885–1972, American astronomer, b. Nashville, Mo., grad. Univ. of Missouri, 1910, Ph.D. Princeton, 1913. He was astronomer at Mt. Wilson…

Arecibo Observatory

(Encyclopedia) Arecibo Observatory, radio-astronomy facility located near Arecibo, Puerto Rico, part of the National Astronomy and Ionosphere Center. Conceived by, designed by, and built under the…

Baade, Walter

(Encyclopedia) Baade, WalterBaade, Waltervälˈtər bäˈdə [key], 1893–1960, German-born American astronomer. From 1919 to 1931 he was on the staff of the Hamburg observatory; from 1931 to 1958, at the…

Encke, Johann Franz

(Encyclopedia) Encke, Johann FranzEncke, Johann Franzyōˈhän fränts ĕngˈkə [key], 1791–1865, German astronomer. He was assistant (1816–22) and director (1822–25) of the observatory at Seeberg (near…

Piazzi, Giuseppe

(Encyclopedia) Piazzi, GiuseppePiazzi, Giuseppej&oomacr;zĕpˈpā pyätˈtsē [key], 1746–1826, Italian astronomer, a Theatine priest from 1769. He became (1781) professor of mathematics at the Univ.…