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National Radio Astronomy Observatory

(Encyclopedia)National Radio Astronomy Observatory (NRAO), federal observatory for radio astronomy, founded in 1956 and operated under contract with the National Science Foundation by Associated Universities, Inc.,...

Medusa, in Greek mythology

(Encyclopedia)Medusa mədo͞oˈsə [key], in Greek mythology, most famous of the three monstrous Gorgon sisters. She was once a beautiful woman, but she offended Athena, who changed her hair into snakes and made he...

Bellerophon

(Encyclopedia)Bellerophon bəlĕrˈəfŏn, –fən [key], in Greek mythology, son of Glaucus (3;) originally called Hipponoüs. He changed his name after he murdered a countryman and was forced to flee to exile. He...

atlas, in geography

(Encyclopedia)atlas, in geography, collection of maps or charts. It usually includes data on various features of a country, e.g., its topography, natural resources, climate, and population, as well as its agricultu...

Hippocrene

(Encyclopedia)Hippocrene hĭpˈəkrēnˌ [key]: see Muses and Pegasus, in mythology. ...

Acrocorinthus

(Encyclopedia)Acrocorinthus ăkˌrōkərĭnˈthəs [key], acropolis, or citadel, of Corinth, overlooking the ancient city. Some ruins of the acropolis remain. The Acrocorinthus was the site of a temple of Aphrodite...

In

(Encyclopedia)In, symbol for the element indium. ...

rocket, in aeronautics

(Encyclopedia)CE5 Relative positions of the components of the Saturn V rocket, the U.S. space vehicle used in the moon missions rocket, any vehicle propelled by ejection of the gases produced by combustion of s...

Cygnus

(Encyclopedia)Cygnus sĭgˈnəs [key] [Lat.,=the swan], northern constellation located SE of Draco and NW of Pegasus. It was depicted as a bird by most ancient cultures. It is sometimes called the Northern Cross be...

Young, Charles Augustus

(Encyclopedia)Young, Charles Augustus, 1834–1908, American astronomer, b. Hanover, N.H., grad. Dartmouth, 1853. He discovered the reversing layer of the solar atmosphere and proved the gaseous nature of the sun's...