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en.wikipedia.org/wiki/Atmosphere_of_Mercury

Mercury has a very tenuous and highly variable atmosphere (surface-bound exosphere) containing hydrogen, helium, oxygen, sodium, calcium, potassium and ...

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

Oct 17, 2016 ... But Mercury isn't ideally located for an atmosphere. ... observations suggested that oxygen made up 42 percent of the tiny planet's atmosphere.

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

Aug 11, 2010 ... Mercury's thin atmosphere contains hydrogen, helium, and oxygen. ... Others are made by radioactive decay or when micrometeorites smash ...

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

Mar 12, 2012 ... What is Mercury's atmosphere made of? It has a tenuous atmosphere made up of hydrogen, helium, oxygen, sodium, calcium, potassium and ...

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 ...

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

Apr 25, 2017 ... Mercury's extremely thin atmosphere contains many different chemicals. ... Messenger spacecraft mission has revealed new information on the chemicals that make up Mercury's atmosphere. ... What is Mercury Made Of?

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

Problem 1 – Draw a pie graph (circle graph) that shows the atmosphere constituents for. Mars and Earth. ... Mercury. 1000. 42%. 22%. 22%. 6%. 8%. Venus. 4.8x1020. 96%. 4%. Earth. 1.4x1021. 78% ... of the atmosphere composed of the gas.

www.britannica.com/place/Mercury-planet/The-atmosphere

Mercury - The atmosphere: A planet as small and as hot as Mercury has no ... At that time Earth-based radar made the remarkable discovery of patches of highly ...

cseligman.com/text/planets/mercatmos.htm

Discussion of what passes for the atmosphere of Mercury. ... The amount of such ' air' must be very, very small, and it is made almost entirely of hydrogen ...