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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…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…Moon Jae-in
(Encyclopedia) Moon Jae-in, 1953–, South Korean political leader, president of South Korea (2017–). The son of North Korean refugees, Moon studied law at Kyung Hee Univ. but was expelled twice for…space exploration
(Encyclopedia) CE5 Moon mission assembly CE5 Stages in a moon mission shown counterclockwise from launching on the first day to splashdown on the ninth day. space exploration, the…satellite, natural
(Encyclopedia) satellite, natural, celestial body orbiting a planet, dwarf planet, asteroid, or star of a larger size. The most familiar natural satellite is the earth's moon; thus, satellites of…Ban Ki-moon
Ban Ki-moon became Secretary-General of the United Nations in January of 2007, succeeding Kofi Annan of Ghana. A career diplomat, Ban Ki-moon has a professional reputation as a calm and efficient…Soleil Moon Frye
Soleil Moon Frye played a spunky orphan in the popular TV series Punky Brewster from 1984-88. The show had an extended life in reruns, making Frye something of a pop culture icon for the '80s…Sun Myung Moon
Name at birth: Yung Myung Moon (Mun)Sun Myung Moon was the founder and leader of the Holy Spirit Association for the Unification of World Christianity, also called the Unification Church, a world-…Brewer's: Blue Moon
Once in a blue moon. Very rarely indeed. On December 10th, 1883, we had a “blue moon.” The winter was unusually mild. Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894Blue…Trending
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