Englishfor English speakers
Kuiper
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noun
United States astronomer (born in the Netherlands) who studied the solar system and suggested in 1951 that there is a belt of comet-like debris at the edge of the solar system (1905-1973)
airborne
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adjective
moved or conveyed by or through air
observatory
Noun
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An observatory is a building where people can observe things related to space, such as stars and planets.