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189 Topic Pages Found in Astronomy
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Open Adams, Walter S. (Walter Sydney), 1876-1956
Adams, Walter S. (Walter Sydney), 1876-1956

US astronomer. He developed the use of spectroscopy in the study of stars and planets, and found that luminosity and the relative intensities of

Open Airy, George Biddell, 1801-1892
Airy, George Biddell, 1801-1892

English astronomer. He installed a transit telescope at the Royal Observatory at Greenwich, England, and accurately measured Greenwich Mean Time by


Book compiled by the Egyptian astronomer Ptolemy during the 2nd century, which included the idea of an Earth-centred universe; it was translated into

Open Amalthea (Moon)
Amalthea (Moon)

One of the inner group of Jupiter's satellites that was discovered in 1892 by E.E. Barnard and until 1979 was thought to be the innermost satellite.

Open Apollonius, of Perga
Apollonius, of Perga

Place : Greece Subject : biography, maths and statistics Greek mathematician whose treatise on conic sections represents the final flowering of Greek

Open Apollo Project (Space Program)
Apollo Project (Space Program)

US space project to land a person on the Moon, achieved on 20 July 1969, when Neil Armstrong was the first to set foot there. He was accompanied on

Open Arago, F. (François), 1786-1853
Arago, F. (François), 1786-1853

Place : France Subject : biography, physics French scientist who made contributions to the development of many areas of physics and astronomy, the

Open Aries (Astrology)
Aries (Astrology)

Zodiacal constellation in the northern hemisphere between Pisces and Taurus, near Auriga, represented as the legendary ram whose golden fleece was

Open Armstrong, Neil, 1930-2012
Armstrong, Neil, 1930-2012

1930–2012, American astronaut, b. Wapakoneta, Ohio, grad. Purdue Univ. (B.S., 1955), Univ. of Southern California (M.S., 1970). A U.S. Navy fighter

Open Asteroids

planetoid, or minor planet, small body orbiting the sun. More than 300,000 asteroids have been identified and cataloged; more than a million are