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Todd, Mabel Loomis

(Encyclopedia)Todd, Mabel Loomis, 1858–1932, American author, b. Cambridge, Mass. A friend of Emily Dickinson, she edited and deciphered much of the Dickinson material in Poems (with T. W. Higginson, Ser. 1 and S...

conjunction, in astronomy

(Encyclopedia)conjunction, in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun. When a body is in conjunction ...

Philomena of Dacia, Peter

(Encyclopedia)Philomena of Dacia, Peter, or Peter Nightingale, fl. 1291–1303, Danish astronomer and mathematician. He taught at the Univ. of Bologna (1291–92) and in Paris, and was a canon of Roskilde Cathedral...

Rømer, Olaus

(Encyclopedia)Rømer, Olaus or Ole ōläˈo͝os, ōˈlə römˈər [key], 1644–1710, Danish astronomer. He is noted for his discovery that light travels at a definite speed and does not move through space instant...

Borschberg, André

(Encyclopedia)Borschberg, André, 1952–, Swiss engineer, businessman, and pilot. With Bertrand Piccard (see under Piccard, Auguste) he founded Solar Impulse to develop a solar-powered plane capable of circumnavig...

Major Planets of the Solar System (table)

(Encyclopedia)Major Planets of the Solar System ...

Kitt Peak National Observatory

(Encyclopedia)Kitt Peak National Observatory, astronomical observatory located southwest of Tucson, Ariz.; it was founded in 1958 under contract with the National Science Foundation and is administered by the Assoc...

Banneker, Benjamin

(Encyclopedia)Banneker, Benjamin, 1731–1806, African-American inventor, astronomer, and mathematician, b. Baltimore co., Md., at what is now Ellicott's Mills. A free black, Banneker was essentially self-taught. H...

Abbot, Charles Greeley

(Encyclopedia)Abbot, Charles Greeley, 1872–1973, American astrophysicist, b. Wilton, N.H. He was acting director in 1896 and director in 1907 of the astrophysical observatory of the Smithsonian Institution; he wa...

New Albany

(Encyclopedia)New Albany, city (1990 pop. 36,322), seat of Floyd co., S Ind., near the falls of the Ohio River opposite Louisville, Ky.; inc. 1819. The city was a shipbuilding center in the 19th cent., and the rive...