Gas Planets?

Question

What are the outer gas planets and why doesn't the gas escape into space?

Answer 1

Gravity holds in it. Those planets are much larger than the Earth, and hence have more gravity to hold in the gas atmosphere from escaping.

Answer 2

The outer planets are Jupiter, Saturn, Uranus, Neptune, Pluto. Well, Pluto is NOT a planet. Bu to me it is. ;D
My Very Excited Mother Just Sat Upon Nine Pines
Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto.
The reason the gas does not escape into space, is because of the planet's gravitationally pull.
Hop that helped. Good Luck with whatever you're doing!

Answer 3

Jupiter (the biggest) and Saturn are considered the classic 'gas giants'. Neptune & Uranus (coined the 'ice planets') are also gas planets, but not nearly as large, and being further away from the sun, are colder. The gas doesn't escape into space because of the intense gravity created by such large planets. Its the same on earth. Earth is mostly solid but also contains gas in the form of atmosphere and the gravity created by our relatively small planet (Jupiter is 318 earth masses) keeps it trapped with us (luckily).
These gas planets are mostly gas but as you get closer to the center of the planet, the power of the gravity condenses it so it becomes thicker the further in you go. Its thought that it becomes liquid at one point and a possible solid core. Even in liquid or gas forms, the motion, gravity and chemical reactions within cause the cores to permeat heat.
hope that answers your question. If you're interested try reading "Planets" by Dava Sobel. Each chapter is a different planet and she comes at it from a different angle (geography, mythology, symbolist, historical). Its an interesting & informative read.

Answer 4

Jupiter, Saturn, Uranus, and Neptune are the gas giant planets. The gas does not escape for the same reason the atmosphere does not escape from the Earth, "gravity."

Answer 5

The outer gas giants are, in order of distance from the Earth, Jupiter, Saturn, Uranus, and Neptune. Gravity keeps the gas from escaping in to space, The gravity on any one of these giant planets is immense.

Answer 6

There are 4 known gas giants in our solar system (Jupiter, Saturn, Uranus, and Neptune) and hundreds of known gas giants in other solar systems just light years away. Some of these extrasolar planets orbit very close to their star (51 Pegasi b orbits its sun in just 4 days!) and are known as "hot Jupiters".

One reason that these gas giants are able to retain their huge atmospheres is gravity. Their enourmous mass allows them to retain lighter gases (such as hydrogen and helium) that smaller planets like earth cannot retain in large quantities.

Another reason that gas giants can retain their gases is due to low temperatures. Jupiter for example is 5 times further away from the sun than earth, and has a temperature of 110 K at the cloudtops (although much higher towards the core). Cooler temperatures lower the escape velocities of lighter gases, while higher temperatures cause the opposite.

Answer 7

Jupiter, Saturn, Neptune, and Uranus.
Because of their gravity.
Have you ever taken a bucket with a little water in it and spun it around real fast and the water stays in the bucket even upside down? That's centrifugal force.Same general principle with the gas not escaping into space, the planets are spinning and orbiting the sun, and have internal gravity.

Answer 8

Jupiter, Saturn, Uranus, and Neptune. The gas stays because of the planets' gravitational pull. The planets' gravitation are stronger than the gravitational effects of any other objects around them.

Answer 9

They are jupiter,saturn,uranus and neptune.
They are very large planets,so their gravity is so great that gas cannot escape into space.

Answer 10

Hi. Jupiter, Saturn, Uranus, and Neptune. Answer 1 is correct, gravity holds the atmosphere, just as on Earth.