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Mercury has a surface pressure that is near enough zero (or a vacuum), the planet holds no real atmosphere due to its small size. There are some trace gases at the surface, but not what one would call a proper atmosphere.

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11y ago
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12y ago

mercury's atmosphere is MAINLY made up of sodium

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9y ago

Mars and Venus both have atmospheres made mostly of carbon dioxide. Earth's atmosphere is mostly nitrogen and oxygen. Mercury does not have an atmosphere.

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Q: What are mercury Venus earth and mars atmospheres made of?
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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.


Do other planets not including earth have atmospheres?

yes, just like Venus, it is the hottest planet and its atmosphere is made up of purely carbon dioxide.


What planet is made out of solid rock?

Mercury, Venus, Earth and Mars.


Why are Mercury Venus and earth are terrestrial planets?

there all made of rock


What are Venus' clouds made of that makes the suns light reflect?

The atmosphere is mainly composed of Carbon Dioxide and Nitrogen but Venus' atmosphere is equivalent to that of 93 Earth Atmospheres.


Which planets terrestrial planet?

The first 4, Mercury, Venus, Earth, and mars are the ones.


Why are mercury venus earth and mars the terrestrials planets?

there all made of rock


What are the four terrestrial planets?

The four innermost planets in our solar system, Mercury, Venus, Earth, and Mars, are considered rocky, or terrestrialplanets, because they are made mostly of metals and carbon and silicon compounds (rock).


What planets is made of rocks?

The planets Mercury, Venus, Earth, and Mars are made of rock.


Does Mercury have an astmspher?

Mercury has an extremely thin atmosphere which is made up of atoms blasted off its surface by the solar wind, a constant stream of particles coming from the outer layer of the sun. Because Mercury is so hot, these atoms quickly escape into space. Unlike the stable atmospheres of Earth and Venus, Mercury's atmosphere is constantly being replenished.


Two Planets with centers made of rocks?

Earth, Mercury, Venus, Mars, Pluto.


What are the first four inner planets mostly made of?

Mercury , venus , our earth and mars