Aurora and discover the mysterious cloud of dust on Mars

Currently, NASA’s Mars atmosphere and volatiles evolution task detector (MAVEN) in the northern hemisphere of Mars to detect the presence of ultraviolet aurora and high-altitude dust clouds.

Aurora and discover the mysterious cloud of dust on Mars

MAVEN UV detector spectral imager observed in the northern hemisphere of Mars atmosphere aurora phenomenon.


According to foreign media reports, people will watch the beautiful aurora on Earth, but whether Mars ever imagined what it would aurora? Because the Martian atmosphere is very thin, direct solar energetic particle bombardment and the depth of penetration of the atmosphere, can form a very bright light phenomenon. Recently, NASA scientists surprised to discover the depths of the Martian northern hemisphere auroral atmosphere.

Mars atmosphere and volatiles evolution task detector (MAVEN) ultraviolet spectral imager aurora observed Mars, scientists will be named the “Christmas Light”, December 20, 2014, before the advent of Christmas MAVEN detector observed a bright ultraviolet aurora across the northern hemisphere of Mars.

Earth’s aurora is bombarding Earth’s atmosphere by high-energy particles, such as electrons, resulting in atmospheric gases glow. University of Colorado ultraviolet spectral imager (IUVS) study team member Stephen Arnold Peng (Arnaud Stiepen), said: “We observed the Martian atmosphere aurora quite surprising depth, than the Earth auroras appear deeper in the atmosphere.”

High-energy particles from the sun, MAVEN solar energetic particle detectors found a large number of high-energy charged particle instrument in the area of ​​the aurora appears. Billions of years ago, Mars, like Earth lost its global magnetic field protection, and therefore be able to direct bombardment of solar particles Martian atmosphere.

The formation of high-energy charged particle energy than household current Martian aurora spark 100 times, so they can penetrate deeper into the Martian atmosphere. At the same time, the research team also unexpectedly found that the presence of the dust cloud 150-300 kilometers above the Martian surface, although the source and composition of the dust cloud is not clear, but NASA said the dust cloud will not have MAVEN and other surround Mars constitute a hazard.

US interference and Space Physics Laboratory, University of Colorado atmospheric (CULASP) Laila – Anderson (Laila Andersson), said: “If the dust from the atmosphere, which implies that we have in the atmosphere of Mars did not grasp some basic principles.” It is unclear dust cloud is a temporary phenomenon or have a long persistence.

Altitude dust cloud at low density, but even so, the densest region of the atmosphere is still very thin.So far other detectors undetected Mars dust cloud. It may be observed from the dust cloud of dust floating in the atmosphere, the dust from Phobos and Deimos, currently this latest study, published in the 46th Lunar and Planetary Science discussed this week in Texas held meeting.

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