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Related Terms:
oort cloud
hummingbird
non periodic
browser
near earth object
reindeer
potentially hazardous object
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solar year
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ice dwarf
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http
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heavenly body
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body
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dyson tree
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fiction
Definitions:
Noun
comet
Definition: (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit
Definition: A celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the Sun and having a "tail" of matter blown back from it by the solar wind as it approaches the Sun.