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parsec

(Encyclopedia)parsec pärˈsĕc [key] [parallax + second], in astronomy, basic unit of length for measuring interstellar and intergalactic distances, equal to 206,265 times the distance from the earth to the su...

Bar Kokba, Simon

(Encyclopedia)Bar Kokba, Simon, or Simon Bar Cochba kōkˈbə [key] [Heb.,=son of the star], d. a.d. 135, Hebrew hero and leader of a major revolt against Rome under Hadrian (132–135). He may have claimed to be a...

decorations, civil and military

(Encyclopedia)decorations, civil and military, honors bestowed by a government to reward services or achievements, particularly those implying valor. The practice of bestowing such decorations dates back at least t...

interstellar matter

(Encyclopedia)interstellar matter, matter in a galaxy between the stars, known also as the interstellar medium. The interstellar gas, which constitutes about 99% of the interstellar matter, consists mostly of hyd...

Ivins, Molly

(Encyclopedia)Ivins, Molly (Mary Tyler Ivins), 1944–2007, U.S. journalist and political columnist, b. Monterey, Calif., B.A. Smith College, 1966, M.A. Columbia School of Journalism, 1967. A decided liberal with a...

Gwynn, Tony

(Encyclopedia)Gwynn, Tony (Anthony Keith Gwynn), 1960–2014, American baseball player and coach, b. Los Angeles. He played baseball and basketball at San Diego State Univ., and had a record 590 career assists as a...

Griffey, Ken, Jr.

(Encyclopedia)Griffey, Ken, Jr. (George Kenneth Griffey, Jr.), 1969–, American baseball player, b. Donora, Pa. The son of a veteran outfielder, he joined the Seattle Mariners of the American League in 1989, playe...

Altair

(Encyclopedia)Altair ăltäˈĭr [key], brightest star in the constellation Aquila (Eagle); Bayer designation α Aquilae; 1992 position R.A. 19h50.5m, Dec. +8°51′. Its apparent magnitude is 0.74, making it one o...

occultation

(Encyclopedia)occultation ŏkˌəltāˈshən [key], in astronomy, eclipse of one celestial body by another, e.g., when the moon lies between a star and the earth. Occultations of stars by the moon are important in ...

Arnold, Henry Harley

(Encyclopedia)Arnold, Henry Harley, 1886–1950, American general, chief of the U.S. Army Air Forces (1942–46), known as “Hap” Arnold, B. Gladwyne, Pa., grad. West Point, 1907. Assigned (1911) to the aviation...