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en.wikipedia.org/wiki/Atmosphere_of_Mercury

Mercury's exospheric hydrogen and helium are believed to come from the Solar wind, while the oxygen is likely to be of crustal ...

www.space.com/18644-mercury-atmosphere.html

Oct 17, 2016 ... Of all the planets in the solar system, Mercury has the thinnest atmosphere, thinner than even Mars. Several components are constantly ...

www.windows2universe.org/mercury/Atmosphere/atmosphere.html

Aug 11, 2010 ... Mercury's thin atmosphere contains hydrogen, helium, and oxygen. It also has smaller amounts of sodium, potassium, calcium, and magnesium ...

spacemath.gsfc.nasa.gov/astrob/10Page7.pdf

Problem 3 – Which planet has the atmosphere with the greatest percentage of ... Mercury. 1000. 42%. 22%. 22%. 6%. 8%. Venus. 4.8x1020. 96%. 4%. Earth.

www.universetoday.com/22088/atmosphere-of-mercury

Mar 12, 2012 ... Mercury's original atmosphere dissipated shortly after the planet formed 4.6 billion years ago with the rest ... Mercury atmospheric composition:.

www.universetoday.com/13992/composition-of-mercury

Apr 30, 2008 ... Astronomers have estimated that the Mercury composition is made up of approximately 70% metals and 30% silicate material. In fact, it's only ...

sciencing.com/chemicals-make-up-mercurys-atmosphere-8800.html

Apr 25, 2017 ... Among other discoveries, the 2008 Messenger spacecraft mission has revealed new information on the chemicals that make up Mercury's ...

education.seattlepi.com/mercury-thin-thick-atmosphere-5421.html

Compared to Earth's atmosphere, that of Mercury is thin enough to be almost ... orbit, scientists now know more about the thin atmosphere's composition.

www.spaceanswers.com/solar-system/what-is-mercurys-atmosphere-like

Dec 10, 2014 ... Asked by Lana Freedman. Mercury's atmosphere is incredibly thin. With a mass of about 5.5 per cent that of the Earth this planet has a far ...