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Ulugh-Beg

(Encyclopedia)Ulugh-Beg or Ulug-Beg both: o͞oˈlo͞og bĕg [key], 1394–1449, Timurid ruler and astronomer. The grandson of Timur (or Tamerlane), he succeeded to the Timurid domain in 1447. A patron of the arts a...

Scheiner, Christoph

(Encyclopedia)Scheiner, Christoph krĭsˈtôf shīnˈər [key], 1579?–1650, German astronomer and mathematician, a Jesuit priest. He taught at Ingolstadt, Rome, and elsewhere and became rector of a Jesuit college...

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 ...

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...

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 ...

Mayer, Johann Tobias

(Encyclopedia)Mayer, Johann Tobias yōˈhän tōbēˈäs mīˈər [key], 1723–62, German mathematician and astronomer. In 1751 he became professor of economics and mathematics at the Univ. of Göttingen, and in 1...

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...

Argelander, Friedrich Wilhelm August

(Encyclopedia)Argelander, Friedrich Wilhelm August frēˈdrĭkh vĭlˈhĕlm ouˈgo͝ost ärˈgəländər [key], 1799–1875, German astronomer. He became director of the observatory at the Univ. of Bonn in 1837 and...

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...

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...