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Gregory, James

(Encyclopedia)Gregory, James, 1638–75, Scottish mathematician. He invented a reflecting telescope (1661), which he described in his Optica promota (1663). In 1668 he became professor of mathematics at the Univ. o...

ISS

(Encyclopedia)International Space Station: see space exploration; space station. ...

Salyut

(Encyclopedia)Salyut, Soviet space station: see space exploration; space station. ...

Tiangong 1 & 2

(Encyclopedia)Tiangong, Chinese space station: see space exploration; space station. ...

Challenger

(Encyclopedia)Challenger, U.S. space shuttle. It exploded (Jan. 28, 1986) 73 seconds into its tenth flight, killing all seven crew members, including the first civilian in space, schoolteacher Christa McAuliffe. Th...

Slipher, Vesto Melvin

(Encyclopedia)Slipher, Vesto Melvin slīˈfər [key], 1875–1969, American astronomer, b. Mulberry, Ind. From 1901 he was at Lowell Observatory, Flagstaff, Ariz., where he served as director (1917–54). Much of h...

Glenn, John Herschel, Jr.

(Encyclopedia)Glenn, John Herschel, Jr., 1921–2016, American astronaut and politician, b. Cambridge, Ohio. On Feb. 20, 1962, he became the first American and the third person to orbit the earth, circling the glob...

Kourou

(Encyclopedia)Kourou, town and commune (2007 pop. 25,918), N French Guiana, on the coast 26 mi (42 km) NW of Cayenne. A rocket-launching base, the Guiana Space Center, is mainly in the commune near the town; the So...

Cape Canaveral

(Encyclopedia)Cape Canaveral kənăvˈərəl [key], low, sandy promontory extending E into the Atlantic Ocean from a barrier island, E Fla., separated from Merritt Island by the Banana River, a lagoon; named (1963)...

X-ray astronomy

(Encyclopedia)X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X ...