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One word- gravity.
Mercury is just simply not massive enough to generate the gravity required to hold gases close enough to the surface to create an atmosphere.
What else can I help you with?
Why doesnt Mercury suport life?
Mercury does not have enough atmosphere and is too hot / cold to support life.
Is Mercury's atmosphere dangerous?
Mercury does not have an atmosphere.
Is there oxygen in Mercury?
No, there is no oxygen in Mercury's atmosphere because Mercury does not have an atmosphere.
What is the thick atmosphere of mercury?
There is no hick atmosphere on Mercury.
How strong is Mercury's atmosphere?
Mercury has virtually no atmosphere.
What is Mercury's atmosphere elements?
Mercury has no significant atmosphere
What atmosphere does the planet mercury have?
Mercury has no significant atmosphere.
Does mercury's atmosphere have storms?
No, Mercury doesn't even have a atmosphere
What are the main componets in mercury atmosphere?
Mercury has no significant atmosphere.
What terrestrial planet has no atmosphere?
Mars has almost no atmosphere. APEX=MERCURY has no atmosphere.
Wind speeds on mercury?
There is no wind because Mercury has no significant atmosphere.
What happens to mercury because it doesnt have an atmosphere?
The lack of atmosphere on mercury means that it's surface temperature has a much greater range. It will cool down to below -170 degrees out of the sun, but as high as 500 degrees or so in the sun. There is also no wind or weather on mercury, so craters can survive for millions of years as they do on the moon.
