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Because the gravitational pull of the planet isn't strong enough to hold any gasses.

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13y ago

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Which planest has almost no atmosphere?

Mercury


What terrestrial planet has no atmosphere?

Mars has almost no atmosphere. APEX=MERCURY has no atmosphere.


Why are there storms on mercury?

There aren't. Mercury has almost no atmosphere. Therefore, it cannot have storms.


Does Mercury have any air?

The planet Mercury has almost no atmosphere, it's essentially a vacuum.


What is the surface atmosphere of Mercury?

Mercury has only a trace atmopshere of hydrogen that is almost null.


Why Mercury is so pitted with craters?

Mercury is pitted with craters because Mercury has almost no atmosphere to protect itself.


How much air is in Mercury's atmosphere?

Very, very little, as Mercury's atmosphere is almost a vacuum only minute traces of gasses are found.


Which is a terrestial planet that has no atmosphere?

Of the inner four terrestrial planets in our solar system - Mercury, Venus, Earth and Mars - Mercury has almost no atmosphere.


Is there any oxygen on Mercury?

The atmosphere on Mercury is about 42% oxygen, but is very thin as to be almost non-existent.


What planet has almost atmosphere?

Mercury is so close to the Sun and so small that it has only a very small atmosphere. It has been blown away by the Sun's solar winds. That means that there is almost no air on Mercury.


What planet has a low air pressure atmosphere?

Mercury has almost no atmosphere so that could be the answer. The otherpossible answeris Mars, which certainly does have a (thin)atmosphere.


What planets has almost no atmosphere?

Mercury is so close to the Sun and so small that it has only a very small atmosphere. It has been blown away by the Sun's solar winds. That means that there is almost no air on Mercury.