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Definition of the Hubble Space Telescope from the Oxford Advanced Learner's Dictionary

 

the Hubble Space Telescope

 
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a large US telescope put into space in 1990 by NASA. It is named after the US astronomer (= scientist who studies the stars, planets, etc.) Edwin Hubble and provides a much clearer view of the universe than could be obtained from the ground. Three months after it began to operate, it found a 'black hole' with a mass of 300 million suns.