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Cepheid variables

(Encyclopedia)Cepheid variables sēˈfēĭd [key], class of variable stars that brighten and dim in an extremely regular fashion. The periods of the fluctuations (the time to complete one cycle from bright to dim a...

Apollo space program

(Encyclopedia)Apollo space program: see space exploration. ...

Infrared Space Observatory

(Encyclopedia)Infrared Space Observatory: see infrared astronomy. ...

Gemini space program

(Encyclopedia)Gemini space program: see space exploration. ...

Mercury space program

(Encyclopedia)Mercury space program: see space exploration. ...

Mariner space program

(Encyclopedia)Mariner space program: see space exploration. ...

Voyager, space probes

(Encyclopedia)Voyager, in space exploration: see space exploration; space probe. ...

Space Transportation System

(Encyclopedia)Space Transportation System, official designation for the U.S. space shuttle. ...

Johns Hopkins University

(Encyclopedia)Johns Hopkins University, mainly at Baltimore. Johns Hopkins in 1867 had a group of his associates incorporated as the trustees of a university and a hospital, endowing each with $3.5 million. Daniel ...

McDonald Observatory

(Encyclopedia)McDonald Observatory, astronomical observatory located on Mt. Locke, near Fort Davis, Tex.; founded in 1932, sponsored by the Univ. of Texas in cooperation with the Univ. of Chicago. Its equipment inc...