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giant planets

   Also found in: Dictionary/thesaurus, Wikipedia 0.01 sec.
giant planets [¦jī·ənt ′plan·əts]
(astronomy)
The planets Jupiter, Saturn, Uranus, and Neptune.


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During this time, a significant number of objects, rich in organic compounds, from the outer Solar System were injected on planet-crossing orbits with the giant planets and may have reached the Asteroid Belt.
According to this model, the nascent giant planets -- Jupiter, Saturn, Uranus and Neptune -- orbited at this time in a pretty compact configuration, between five and 15 astronomical units (AUs) from the Sun.
The other set of images, taken by a team using telescopes in Hawaii, shows three giant planets orbiting a star named HR8799 in the constellation Pegasus, about 130 light-years away from the Earth.
 
 
 
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