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A gas giant is a giant planet composed mainly of hydrogen and helium. [1] Jupiter and Saturn are the gas giants of the Solar System . The term "gas giant" was originally synonymous with " giant planet ".
Gas giants are split into five classes (numbered using Roman numerals) according to their modeled physical atmospheric properties. In the Solar System, only Jupiter and Saturn are within the Sudarsky classification, and both are Class I. The appearance of planets that are not gas giants cannot be predicted by the Sudarsky system, for example ...
Ice giants have distinctly different interior compositions from gas giants. The Solar System's ice giants, Uranus and Neptune, have a hydrogen-rich atmosphere that extends from the cloud tops down to about 80% (Uranus) or 85% (Neptune) of their radius. Below this, they are predominantly "icy", i.e. consisting mostly of water, methane, and ammonia.
NASA's Juno spacecraft captured this view of Jupiter during the mission's 54th close flyby of the giant planet Sept. 7, 2023. ... view of the largest planet in our solar system. ... gas giant will ...
If the formation of pebbles is slow, pebble accretion leads to the formation of a few giant planets in the outer Solar System. The formation of the gas giants is a long-standing problem in planetary science. [13] The accretion of the cores of giant planets via the collision and mergers of planetesimals is slow and may be difficult to complete ...
Jupiter is the biggest planet in our solar system, according to NASA. The planet is what’s known as a gas giant, which means it doesn’t have a solid surface — though it may have a solid core ...
Studies of discs around other stars have also done much to establish a time frame for Solar System formation. Stars between one and three million years old have discs rich in gas, whereas discs around stars more than 10 million years old have little to no gas, suggesting that giant planets within them have ceased forming. [38]
The gas giants in our solar system — Jupiter, Saturn, Uranus and Neptune — are much denser. ... is ideal for studying unconventional planetary formation and evolution. The planet was confirmed ...