A gas giant is a giant planet composed mainly of hydrogen and helium. Jupiter
and Saturn are the Solar System's gas giants. ... are often combined, hydrogen
planets need not be as large as the f...
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 ...
Aug 25, 2015 ... The solar system's outer planets — Jupiter, Saturn, Uranus and Neptune ... A gas
giant is a large planet composed mostly of gases, such as ...
If Jupiter and Saturn are gas giants, could you fly straight through them? ... When
the planets were first forming, the solar system was a big, swirling disk of gas ...
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.
... We can trace almost all the differences to the formation of the solar system.
Dec 3, 2014 ... Our Solar System is made up of different regions, which are ... mostly of silicates
and metals, whereas the outer planets are gas giants.
Swarms of mini-planets, called asteroids, also travel in the Solar System, and
much ... Rocks, dust, and gases circling in a disk around the Sun began lumping
... The four planets closest to the Sun are largely made up of rock, like the Earth, ...
Apr 23, 2014 ... In our Solar System, astronomers often divide the planets into two ... The outer
planets are further away, larger and made up mostly of gas.
Scientists believe that the solar system was formed when a cloud of gas and dust
... Squeezing made the cloud start to collapse, as gravity pulled the gas and ... as
particles and small clumps stuck to them, eventually forming planets or moons .
Two easy groupings are composition (what they are made up of) and size. ... The
gas planets are mostly made up of gases (hydrogen and helium).