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Schiaparelli, Giovanni Virginio

(Encyclopedia)Schiaparelli, Giovanni Virginio skyäpärĕlˈlē [key], 1835–1910, Italian astronomer. He was director (1862–1900) of the Brera Observatory, Milan. He is especially noted for having detected (18...

Gersonides

(Encyclopedia)Gersonides lēˈvī bĕn gûrˈshən [key], 1288–1344, Jewish philosopher, astronomer, and mathematician, called also Ralbag, from the initials of his Hebrew name, b. Languedoc. He wrote scientific ...

Al-Farghani

(Encyclopedia)Al-Farghani ălfrəgāˈnəs [key], d. after 861, Arab astronomer. Al-Farghani was born in Farghana, Transoxania (present-day Fergana, Uzbekistan), and died in Egypt. His most important work, written ...

Oort, Jan Hendrik

(Encyclopedia)Oort, Jan Hendrik ōrt [key], 1900–1992, Dutch astronomer. He confirmed (1927) Bertil Lindblad's theory of the Milky Way galaxy's rotation. In the 1950s he and his colleagues used radio astronomical...

Ibn Ezra, Abraham ben Meir

(Encyclopedia)Ibn Ezra, Abraham ben Meir mâr [key], c.1089–1164, Jewish grammarian, commentator, poet, philosopher, and astronomer, b. Tudela, Spain. He traveled widely and wrote a number of ethical treatises, p...

Brahmagupta

(Encyclopedia)Brahmagupta bräˌməgo͝opˈtə [key], c.598–c.660, Indian mathematician and astronomer. He was among the first to meaningfully discuss the concepts of zero and of negative numbers. He wrote in ver...

Perrine, Charles Dillon

(Encyclopedia)Perrine, Charles Dillon pərīnˈ [key], 1867–1951, American astronomer, b. Steubenville, Ohio. He was on the staff of Lick Observatory (1893–1909) and was (1909–36) director of the Argentine Na...

Young, Charles Augustus

(Encyclopedia)Young, Charles Augustus, 1834–1908, American astronomer, b. Hanover, N.H., grad. Dartmouth, 1853. He discovered the reversing layer of the solar atmosphere and proved the gaseous nature of the sun's...

Whipple, Fred Lawrence

(Encyclopedia)Whipple, Fred Lawrence, 1906–2004, American astronomer, b. Red Oak, Iowa. After graduating from the Univ. of California, Berkeley (Ph.D. 1931), he accepted a position at Harvard, where he remained f...

Blaeu, Willem Janszoon

(Encyclopedia)Blaeu, Willem Janszoon vĭˈləm yänˈsōn blou [key], 1571–1638, Dutch cartographer and printer. He studied astronomy and instrument making under the Danish astronomer Tycho Brahe. The printing es...