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Gas giant - Wikipedia


A gas giant is a giant planet composed mainly of hydrogen and helium. Jupiter and Saturn are ... something of a misnomer, because throughout most of the volume of all giant planets the pressure is s...

What are planets made of?


The other planets are not solid. Jupiter, for instance, is made up mostly of trapped helium, hydrogen, and water. In our solar system, the four "gas giants" are ...

General Planet Information - Nine Planets for Kids


The rocky planets are mostly made up of rock and metal. These planets are very heavy and move slowly. They also do not have rings and very few moons. GAS ...

Gas Giants: Facts About the Outer Planets - Space.com


Aug 25, 2015 ... Orbits and sizes are not shown to scale. Credit: NASA. A gas giant is a large planet composed mostly of gases, such as hydrogen and helium, ...

Q & A: Planets made of gas | Department of Physics | University of ...


Mercury has a very low-pressure atmosphere. Most of the reason for this is that small planets do not have a gravitational pull strong enough to hold lighter gases  ...

Why are there no liquid planets in our solar system? - Quora


Many elements, particularly abundant ones we find as gases here on earth, are only liquid at .... Even Gas Giants are not made entirely of gas; they have a rocky core, which can be >10 times the mass of Earth. There are planets with entirely ...

The Outer Planets: Giant Planets: What Are They, and Where Are ...


SUMMARY: The jovian planets are essentially big balls of gas, each ... Made almost entirely of hydrogen and helium, these planets do not have solid surfaces.

Planets and How They Formed | Las Cumbres Observatory


This disc, called the solar nebula, was composed mainly of hydrogen and helium, ... explains why the inner planets are rocky and the outer ones are gaseous. ... like water and methane did not vaporize and were able to form the giant planets.

The Inner Planets of Our Solar System - Universe Today


Jun 25, 2016 ... For starters, the inner planets are rocky and terrestrial, composed mostly of silicates and metals, whereas the outer planets are gas giants. ... atmosphere, but it's not just man-made objects that have trouble getting through.

Gas Giant Facts (The Outer Planets) - Space Facts


Gas giants are large planets that contain more than 10 times the mass of Earth, they are also known as the Jovian or Outer Planets. ... Gas giants are not all gas. ... A ring system around a planet or asteroid is a disk made up of dust, chunks of ...