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William Pierce FRYE, Congress, ME (1830-1911)

Senate Years of Service: 1881-1911 Party: Republican FRYE William Pierce , a Representative and a Senator from Maine; born in Lewiston, Androscoggin County, Maine, September 2, 1830; attended the…

nutation

(Encyclopedia) nutation, in astronomy, a slight wobbling motion of the earth's axis. The causes of nutation are similar to those of the precession of the equinoxes, involving the varying attraction…

tide

(Encyclopedia) tide, alternate and regular rise and fall of sea level in oceans and other large bodies of water. These changes are caused by the gravitational attraction of the moon and, to a lesser…

occultation

(Encyclopedia) occultationoccultationŏkˌəltāˈshən [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…

Selene

(Encyclopedia) SeleneSelenesəlēˈnē [key], in Greek mythology and mythology, moon goddess; daughter of the Titans Hyperion and Theia and sister of the sun god Helios. There was no known moon cult…

ephemeris time

(Encyclopedia) ephemeris time (ET), astronomical time defined by the orbital motions of the earth, moon, and planets. The earth does not rotate with uniform speed, so the solar day is an imprecise…

Shepard, Alan Bartlett, Jr.

(Encyclopedia) Shepard, Alan Bartlett, Jr., 1923–98, American astronaut, b. East Derry, N.H., grad. Annapolis, 1944. He served on a destroyer during World War II and later had extensive experience as…

radar astronomy

(Encyclopedia) radar astronomy, application of radar to the determination of distances and planetary features within the solar system, such as rotation rates. A short burst of radio waves is…

Hipparchus, Greek astronomer

(Encyclopedia) Hipparchus, fl. 2d cent. b.c., Greek astronomer, b. Nicaea, Bithynia. He is the first systematic astronomer of whom there are records. He made his observations chiefly on the island of…