As the gas giants developed, their gravitational pull began to perturb the orbits of the planetesimals in the inner E-K Belt.
Gas giants may have a rocky or metallic core—in fact, such a core is thought to be required for a gas giant to form—but the majority of its mass is in the form of the gaseous hydrogen and helium, with traces of water, methane, ammonia, ...
Gas giants contain intense magnetic fields that often create unique waveforms. The resulting EM interference sounds very strange when played over speakers.
GAS GIANTS
The gas giants are the large outer planets of our Solar System: , , , and (but not tiny, rocky Pluto).
The gas giants have long acted as planetary goal keepers, protecting the Earth and inner planets from comets, a point reinforced around ten days ago when a huge impact scar appeared on Jupiter.
The gas giants were massive enough to retain a "primary atmosphere" of hydrogen and helium captured from the surrounding solar nebula.
The gas giants have numerous satellites, many of which are large, and seem as interesting as any planet. Small "new" satellites of the Jovian planets are being discovered every few years.
The four gas giants against the Sun: Jupiter, Saturn, Uranus, Neptune (Sizes to scale)
According to the IAU's current definitions, there are eight planets in the Solar System. In increasing distance from the Sun, they are: ...
The so-called gas giants - Jupiter, Saturn, Uranus, Neptune - are much larger.
The orbits of the first eight planets are nearly circular and in a thin disk around the sun.
Pluto and the newly-discovered object are different: ...
Like the other gas giants, Uranus has a very thick cloud cover and an atmosphere made up mostly of hydrogen, helium, methane, and ammonia. The trace amount of methane is what gives Uranus and its twin, Neptune, their blue color.
The four outer planets, or gas giants (sometimes called Jovian planets), collectively make up 99 percent of the mass known to orbit the Sun. Jupiter and Saturn's atmospheres are largely hydrogen and helium.
Almost all extrasolar planets (those outside our solar system) discovered to date have masses which are about the same or larger than the gas giants within the solar system.
In the Solar System, we have two groups of planets - the outer gas giants and the inner rocky ones.
Although narrow rings have been seen around each of the other three gas giants, none have displayed the striking nonuniformity of particle density of Neptune's outermost ring, provisionally called 1989N1R.
Neptune is the outermost planet of the gas giants. It has an equatorial diameter of 49,500 kilometers (30,760 miles). If Neptune were hollow, it could contain nearly 60 Earths. Neptune orbits the Sun every 165 years.
Uranus is the seventh planet from the Sun and the third of the four gas giants, revolving outside the orbit of Saturn and inside the orbit of Neptune.
It is one of the gas giants in the outer parts of our solar system, residing at a mean distance of 2.87 - 109 km, with a period of revolution of little over 84 years.
Way out beyond Jupiter is the second of the gas giants, Saturn.
When Galileo focused his telescope on Saturn he was puzzled to find that it had an irregular shape.
The four outer planets, the gas giants, are substantially more massive than the terrestrials.
Pioneer: Probe to the gas giants
Planet: Derived from the Greek meaning 'wanderer', a planet is a body orbiting a star that is not a star itself.
is a "gas giant"; all gas giants are similar to Jupiter in composition. Jupiter's diameter is 11 times Earth's diameter and 20% larger than , making it the largest planet in the solar system. Gas giant are also very much larger than planets.
Therefore, Jupiter and the related planets Saturn, Uranus, and Neptune are sometimes called Gas Giants (these are also called the Jovian Planets, since Jove was another name for Jupiter).
55 Cancri consists of a yellow dwarf and a smaller red dwarf, with five planets orbiting the primary star; one terrestrial planet and four gas giants. It is the only planetary system discovered to have five planets and possibly more.
It is unlike the terrestrial planets—Mercury, Venus, Earth, and Mars—which are rocky, and it is unlike the gas giants—Jupiter, Saturn, Uranus, and Neptune.
Activities in this section focus on solar science, the rocky worlds of the inner solar system and the gas giants and icy moons of the outer solar system.
Prior to this discovery, Uranus was the only one of the gas giants not known to have "irregular" moons, that is, ones whose orbits are not direct and approximately in the plane of the planet's equator.
Uranus is one of the smaller gas giants in our solar system, but it is still large enough to hold 64 planets the size of Earth.
It is the fourth largest planet and is one of the gas giants planets.
Neptune has four very dark rings.
Neptune has 13 known moons.
At Mercury, day and night temperatures differ greatly; for the gas giants, parentheses indicate that temperature increases rapidly with depth in the observed atmosphere.
The name originated in the 18th century because of their similarity in appearance to gas giants when viewed through small optical telescopes, and is unrelated to the planets of the solar system....
The 4 smaller inner planets are similar to Earth as they have rocky surfaces and land. The gas giants on the other hand have no solid surfaces to stand on.
A large planet with a small, rocky core and a deep atmosphere composed mostly of hydrogen and helium. Our solar system contains four gas giants: Jupiter, Saturn, Uranus, and Neptune. This group is also known as Jovian planets.
Gaseous Nebula ...
(The gas giants Jupiter and Saturn also have differential rotation.) The movements of the sunspots indicate that the Sun rotates once every 27 days at the equator, but only once in 31 days at the poles.
In the case of Jupiter and Saturn, these layers consist primarily of hydrogen and helium. Uranus and Neptune have less of these gases and greater concentrations of heavier elements, although all four planets are known as "gas giants." ...
The planets Jupiter, Saturn, Uranus and Neptune are all gas giants presenting little to no solid surface for any person brave enough to go there to land upon. Pluto is much too far away to present an easy target.
Kuiper Belt objects, and comets, though classification is ambiguous in some cases. Some of the smaller moons in the solar system appear to be captured asteroids, including the two moons of Mars, and a number of the outer moons of the four gas giants.
In either case, these first protoplanets had gravitational fields strong enough to scoop up more of the remaining gas and dust in the solar nebula, allowing them to grow into the gas giants we see today.
Some planets, such as Earth and the outer gas giants, were found to have global magnetic fields that provide shielding against the onslaught of solar wind particles.
 See also: Gas Giant, Giant, Planet, Earth, Solar
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