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

Oct 18, 2016 ... Of all the planets in the solar system, Mercury has the thinnest atmosphere, ... that oxygen made up 42 percent of the tiny planet's atmosphere.

https://www.space.com/18643-mercury-composition.html

Oct 14, 2016 ... Mercury is a terrestrial planet with a rocky surface and metallic core. ... and silicon , suggesting that the elements lie on the planet's surface. ... Mercury's iron core generates a magnetic field about one percent as strong as ...

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

Apr 25, 2017 ... The abundance of nitrogen is 2.7 percent of Mercury's air, and oxygen ... Mercury's argon probably seeps out from deep inside the planet and is ...

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

Mar 12, 2012 ... Mercury's original atmosphere dissipated shortly after the planet ... solar wind, volcanic outgassing, radioactive decay of elements on Mercury's ...

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

Apr 30, 2008 ... Mercury is a terrestrial planet, like like all of the 4 inner planets: ... it down as much, so it actually has much more heavier elements inside it.

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

Aug 11, 2010 ... There is a very thin atmosphere around the planet. Mercury's thin atmosphere is constantly being "blown away" into space by the pressure of ...

https://solarsystem.nasa.gov/planets/mercury/in-depth/

Apr 25, 2019 ... Despite its proximity to the Sun, Mercury is not the hottest planet in our solar ... miles (2,074 kilometers), about 85 percent of the planet's radius.

https://www.msnucleus.org/membership/html/k-6/uc/solar_system/5/ucss5_3a.html

An atmosphere is the layer of gases that envelop a planet. On the Earth, it is ... These elements were likely blown from the surface of Mercury by the solar wind.

https://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 water vapor, with a combined pressure level of about 10−14 bar (1 nPa). The exospheric species originate either from the Solar wind or from the planetary ... The near-surface concentrations of these elements were estimated to vary ...

https://solarsystem.nasa.gov/planets/mercury/overview/

Apr 10, 2019 ... The Sun-scorched innermost planet is an intriguing world of extremes.