giant planets

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Related to gas giant: Saturn

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.
References in periodicals archive ?
Astronomers think that gas giants generally form farther from their stars, while rocky worlds like Earth form closer in.
All of the gas giant planets in our solar system have rocky and icy moons," said Kaltenegger.
These disks provide the raw material for forming gas giants like Jupiter.
The two oil and gas giants are reportedly shifting their focus on exploration and production.
Gas giant exoplanets are rare, and astronomers have discovered they do not like to stray far from their parent star.
Professor Geoffrey Marcy said the gas giant, about four times the size of Jupiter, revolves round 55 Cancri, a star 41 light years away in the constellation of Cancer.
DAVID Varney, former boss at gas giant BG, was yesterday poached as chairman for BT Wireless.
Alexeo Miller, Chairman of the Russian gas giant Gazprom, is quoted by the Interfax news agency as having indicated that the company is not planning to conclude any further gas export contracts to Europe in the near future.
AA members have overwhelmingly backed the breakdown service's sale to gas giant Centrica, it was announced yesterday.
In Argentina, Hanover has successfully negotiated a 10-year contract expected to commence in the first quarter 2003 with the Argentina operations of the international oil and gas giant, Repsol-YPF.
The German daily Handelsblatt has reported that Alexei Miller, Chairman of the Russian gas giant Gazprom, has announced his intention to raise the stake held in the company by foreign groups from the current 11.
Rem Viakhirev, Chairman of the gas giant Gazprom, has indicated that Russia aims to cut back exports of natural gas through the Ukraine over the next six months.