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2 Encyclopedia Article
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2,503 words, approx. 9 pages
Observatories, Ground Astronomers study the universe by measuring electromagnetic radiation—gamma rays, X rays, optical and infrared radiation, and radio waves—emitted by planets, stars,...
8,268 words, approx. 28 pages
Ground-Based Observatories The exploration of space is not limited to the flights of astronauts aboard spacecraft and shuttles launched into space by rockets and boosters. That type of space explorati...
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