gas giant

A gas giant (sometimes also known as a jovian planet after the planet Jupiter, or giant planet) is a large planet that is not primarily composed of rock or other solid matter. There are four gas giants in the Solar System: Jupiter, Saturn, Uranus and Neptune. However, astronomers sometimes categorize Uranus and Neptune as "ice giants", in order to emphasize the differences in composition between them and larger gas giants like Jupiter and Saturn.[1][2] Many extrasolar gas giants have been identified orbiting other stars.

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ZME Science posts about gas giant

Closest rogue planet discovered is just 100 light-years away

Thu, Nov 15, 2012

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Like in a scene from a Sci-fi novel, about 100 light years away, somewhere in the constellation Doradus, a planet is travelling around the galaxy by itself, without orbiting a parent star. This “rogue planet“, has a temperature of about 400C and a mass between 4 to 7 times that of Jupiter – close to [...]

Stars create gaps devoid of gas giants, supercomputer simulation shows – contradicted by our own solar system

Tue, Mar 20, 2012

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Gas giants might just be the most whimsical planets of all: they don’t just settle at any old point on the orbit – instead, they only choose certain regions and stay clear of others – at least according to a new supercomputer simulation. A new study recently revealed that the orbital deserts and pile-ups caused [...]

Astronomers unveil densest rocky planet: ‘super rocky exotic Earth’

Fri, Apr 29, 2011

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The planet in case is 55 Cancri e, and it’s 60 per cent larger in diameter than Earth but eight times as massive, which makes it twice as dense as Earth, and almost as dense as lead. Earth like rocky planets   Generally speaking, planets come in two flavours: rocky earth-like planets, or gas giants [...]

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