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All the sun's planets probably had similar atmospheres when they first formed, billions of years ago. The most common gases were the light gases, hydrogen and helium, with smaller amounts of oxygen, nitrogen and other gases.
The immense gravity of the giant planets, Jupiter, Saturn, Uranus and Neptune, was able to hold the hydrogen and helium, which remain the predominant gases in their atmospheres, along with methane formed by the combination of hydrogen with free carbon. However, hydrogen and helium gradually escaped from the atmospheres of the smaller planets, where gravity is insufficient to hold the light gases permanently.
Even the heavier gases, such as oxygen and nitrogen, as well as carbon dioxide and water vapour, can gradually escape from smaller planets, such as Mars and Mercury. So, these planets now have quite thin atmospheres. The Moon and other small bodies in the solar system have essentially no atmosphere.
In our solar system, only the Earth and Venus are the right size to lose most of the light gases, while retaining gases such as oxygen, nitrogen, carbon dioxide and water vapour.
What else can I help you with?
What are the atmospheres of outer planets?
its made out of jaffa cakes
Why are the components of Jovian atmospheres so different from those of terrestrial planets?
They are different because terrestrial planets is any of Earth like planets including: Mercury, Venus, Mars, and Earth. However jovian planets are the Jupiter like planets including: Jupiter, Saturn, Uranus, and Neptune
Why do all planets with and without atmospheres collide with meteoroids?
All planets, both with and without atmospheres, encounter meteoroids. If the planet has an atmosphere then those meteoroids will burn up long before reaching the surface. Those without atmospheres do not have such protection and so the meteoroids strike the surface directly.
Do the gas giants have thick or thin atmospheres?
Gas giants such as Jupiter and Saturn have thick atmospheres composed mainly of hydrogen and helium. These atmospheres can extend thousands of kilometers deep into the planets' interiors.
How are the inner planets and the gas giants different?
Inner planets are rocky and mostly composed of metal and silicate materials, with solid surfaces. Gas giants, on the other hand, are primarily composed of hydrogen and helium gases, with no solid surface. Gas giants are much larger in size and have thick atmospheres, while inner planets are smaller and have thin atmospheres.
What is one way in which the sun and planets are different?
They are different because they have different atmospheres to the Sun. The main difference is that the Sun is a star which radiates energy and the planets are cold bodies which do not produce energy.
Do inner planets have thicker atmospheres than outer planets?
no
Do outer planets have atmospheres?
Yes
Could you list the planets in order from the thickest to thinest atmospheres?
The terrestrial planets in order from the thickest to thinnest atmospheres Venus, Earth, Mars, and Mercury. Since the gas giants are almost entirely made of gas, it is difficult to determine where the atmospheres end.
What has the author J-P Beaulieu written?
J.-P Beaulieu has written: 'Molecules in the atmospheres of extrasolar planets' -- subject(s): Atmospheres, Extrasolar planets, Congresses, Planets
What are effects that atmospheres have on planets?
greenhouse effect
What planets do not have oxygen?
Mercury, Venus, Mars, and the gas giants Jupiter, Saturn, Uranus, and Neptune do not have oxygen in their atmospheres. These planets have atmospheres composed of different elements and compounds, but oxygen is not a significant component.
Why do planets have different colors?
Planets have different colors due to the composition of their atmospheres and the surface materials. For example, Earth's blue color comes from its oceans and atmosphere scattering sunlight, while Mars appears red because of iron oxide, or rust, in its soil. Gas giants like Jupiter have bands of different colors due to various gases in their atmospheres.
Which terrestrail planets have atmospheres?
Venus, Earth and Mars.
What are the atmospheres of outer planets?
its made out of jaffa cakes
How are other planets compared with earth?
some planets are bigger and some are smaller. some have different atmospheres. some of the planets are almost pure gas. some planets have as much as like 60 moons while ours only has one
How many planets have atmosphere?
Seven of the eight planets in out solar system have atmospheres. Mercury is the only planet without one.
