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    MAVEN tagged posts

    MAVEN Spacecraft Shrinking its Mars Orbit to prepare for Mars 2020 rover

    February 11, 2019, Categories  Astronomy/Space

    NASA's MAVEN spacecraft shrinking its Mars orbit to prepare for Mars 2020 rover
    Aerobraking plan for MAVEN. (left) Current MAVEN orbit around Mars: 6,200 kilometers (~3,850 miles) at highest altitude, and an orbit period of about 4.5 hours. (center) Aerobraking process: MAVEN performs a series of “deep dip” orbits approaching to within about 125 kilometers (~78 miles) of Mars at lowest altitude, causing drag from the atmosphere to slow down the spacecraft. Over roughly 360 orbits spanning 2.5 months, this technique reduces the spacecraft’s altitude to about 4,500 kilometers (~2,800 miles) and its orbit period to about 3.5 hours. (right) Post-aerobraking orbit, with reduced altitude and shorter orbit period. Credit: NASA’s Scientific Visualization Studio/Kel Elkins and Dan Gallagher

    Read more at: https://phys.org/news/2019-02-maven-spacecraft-mars-orbit-rover.html#jCp
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    Solar Wind stripped Martian atmosphere away

    March 31, 2017, Categories  Astronomy/Space

    An illustration of the MAVEN spacecraft. Image courtesy NASA.

    An illustration of the MAVEN spacecraft. Image courtesy NASA.

    Solar wind and radiation are responsible for stripping the Martian atmosphere, transforming Mars from a planet that could have supported life billions of years ago into a frigid desert world, according to new results from NASA’s MAVEN (Mars Atmosphere and Volatile Evolution Mission) spacecraft led by the University of Colorado Boulder.

    “We’ve determined that most of the gas ever present in the Mars atmosphere has been lost to space,” said Bruce Jakosky, LASP Prof, principal investigator for MAVEN. “The team made this determination from the latest result, which reveals that about 65% of the argon that was ever in the atmosphere has been lost to space.”

    MAVEN team members had previously announced measurements showing that atmosphe...

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