Mercury’s original atmosphere dissipated shortly after the planet formed 4.6 billion years ago with the rest of the Solar System. This was because of Mercury’s lower gravity, and because it’s so close to the Sun and receives the constant buffeting from its solar wind. Its current atmospher...
Mercury - Atmosphere, Temperature, Radiation: A planet as small and as hot as Mercury has no possibility of retaining a significant atmosphere, if it ever had one. To be sure, Mercury’s surface pressure is less than one-trillionth that of Earth. Neverth
A non-stoichiometric model of the composition of the atmosphere of Mercury and the Moon. Planet. Space Sci. 45 (1), 81-94.Morgan, T. H., and Killen, R. M. (1997) A non-stoichiometric model of the composition of the atmospheres of Mercury and the Moon, Planet Splace Sci. , 45,...
of theMercury Atmosphereand Surface Composition Spectrometer (MASCS) instrument package. This spectrometer operates from 115 to 600nm and its goal is to map the constituents of the atmosphere and provide information to relate them to specific source and production mechanisms. MASCS has detected ...
By improving our understanding Mercury's composition, atmosphere, and magnetism, scientists can better understand how rocky-Earth-like planets came to be — and provide insight into whether other far-off solar systems may have formed similar planets. ...
Peatland vegetation takes up mercury (Hg) from the atmosphere, typically contributing to net production and export of neurotoxic methyl-Hg to downstream ecosystems. Chemical reduction processes can slow down methyl-Hg production by releasing Hg from peat
She was a member of the group, led by Isidore Adler and Jack Trombka, that pioneered the use of orbital x-ray and gamma-ray spectrometers to determine the composition of planetary surfaces. She participated in the Flagstaff Lunar Data Consortium, the first attempt to create a common format ...
Venus' very thick atmosphere traps so much heat by the greenhouse effect that it has the hottest surface despite being almost twice as far from the sun as Mercury. What are some of the most fascinating aspects of this planet? Although it is the smallest planet in the Solar System (excluding...
Orbit: Mercury orbits Sol at 0.307 - 0.467 astronomical units with a year lasting 87.97 Earth days and a day length of 58 days and 15.5 hours. Atmosphere: extremely thin (trace) composition by volume - 42% oxygen (O2), 29% Na, 22% ...
For example, regional differences are expected for se-ice physical properties (e.g., dynamic deformation, thermal processes (melting and freezing)), and chemical composition. These factors are expected to have non-negligible impacts on key processes of the Hg cycle, such as redox reactions and ...