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Farinelli, Carlo Broschi

(Encyclopedia)Farinelli, Carlo Broschi kärˈlō brôˈskē färēnĕlˈlē [key], 1705–82, Italian male soprano, greatest of the castrati (see castrato), pupil of Niccolò Porpora, in whose operas he sang (1734�...

Foucault, Jean Bernard Léon

(Encyclopedia)Foucault, Jean Bernard Léon zhäN bĕrnärˈ lāôNˈ fo͞okōˈ [key], 1819–68, French physicist. Known especially for his research on the speed of light, he determined its velocity in air and fou...

Harvard College Observatory

(Encyclopedia)Harvard College Observatory, astronomical observatory located in Cambridge, Mass., operated by Harvard (Harvard College at the time of the observatory's founding in 1839). Its equipment includes a 61-...

Greenwich mean time

(Encyclopedia)Greenwich mean time or Greenwich meridian time (GMT), the former name for mean solar time at the site of the Royal Observatory in Greenwich, England, which is located on the prime meridian. In 1925 th...

Lick Observatory

(Encyclopedia)Lick Observatory, astronomical observatory located on Mt. Hamilton, Calif., near San Jose; the first mountaintop observatory in the world, it was founded through gifts made by James Lick in 1874–75 ...

Keeler, James Edward

(Encyclopedia)Keeler, James Edward, 1857–1900, American astronomer, b. La Salle, Ill. At the age of 21 he went on the Naval Observatory expedition to Colorado to observe the solar eclipse of July, 1878. In 1886 h...

Brashear, John Alfred

(Encyclopedia)Brashear, John Alfred brəshērˈ [key], 1840–1920, American maker of scientific instruments and educator, b. Brownsville, Pa. A mechanic by trade, he taught himself the art of making lenses and mir...

Sitter, Willem de

(Encyclopedia)Sitter, Willem de vĭlˈəm də sĭtˈər [key], 1872–1934, Dutch astronomer and mathematician. He was professor from 1908 at the Univ. of Leiden and in 1919 became director of its observatory. His ...

Siding Spring Observatory

(Encyclopedia)Siding Spring Observatory, astronomical observatory located on Siding Spring Mountain, near Coonabarabran, at an altitude of nearly 4,000 ft (1,220 m) in the Warrumbungle Mts. of New South Wales, Aust...

Nash, Paul

(Encyclopedia)Nash, Paul, 1889–1946, English painter and wood engraver. He studied at the Slade School of Art, London. Nash worked at the front as official artist in both World Wars. He helped to form Unit One, a...