giant planets

The planets Jupiter, Saturn, Uranus, and Neptune, which have diameters between 3.9 and 11.2 times that of the Earth and masses of between 14 and 318 Earth masses. They orbit the Sun at mean distances ranging from 5.21 AU for Jupiter to 30.06 AU for Neptune in periods from 11.86 to 164.79 years. All have low densities – from 0.7 to 1.8 times that of water – and are probably composed largely of hydrogen in its molecular or metallic state. Their visible surfaces are thought to be clouds of ammonia or methane. They all have planetary ring systems and share at least 150 satellites between them (see Table 2, backmatter).

giant planets

[¦jī·ənt ′plan·əts] (astronomy) The planets Jupiter, Saturn, Uranus, and Neptune.

单词	giant planets
释义	giant planets giant planets The planets Jupiter, Saturn, Uranus, and Neptune, which have diameters between 3.9 and 11.2 times that of the Earth and masses of between 14 and 318 Earth masses. They orbit the Sun at mean distances ranging from 5.21 AU for Jupiter to 30.06 AU for Neptune in periods from 11.86 to 164.79 years. All have low densities – from 0.7 to 1.8 times that of water – and are probably composed largely of hydrogen in its molecular or metallic state. Their visible surfaces are thought to be clouds of ammonia or methane. They all have planetary ring systems and share at least 150 satellites between them (see Table 2, backmatter). giant planets [¦jī·ənt ′plan·əts] (astronomy) The planets Jupiter, Saturn, Uranus, and Neptune.
随便看	government information office government information online government information online service system government information preservation working group government information quarterly government information round table government information security reform government information security reform act of 2000 government information security review act government information services policy board government information technology services government information technology services board government information value exchange for states government in-plant testing government installation acceptance test government institute of cottage industries government institutions pension fund government instrumentality doctrine government instrument market government insurance government insurance office government integrated technical information system government integrated telecommunications network sdn bhd government intellectual property law association government intellectual property policy council