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    Mars tagged posts

    Devilish Source of Dust in Atmosphere of Earth and Mars

    September 19, 2017, Categories  Astronomy/Space, Environment/Geology

    Sampling of a dust devil during field campaign ‘Morocco 2016’. The samples are still under analysis. Credit: Jan Raack/Dennis Reiss

    Sampling of a dust devil during field campaign ‘Morocco 2016’. The samples are still under analysis. Credit: Jan Raack/Dennis Reiss

    Swirling columns of sand and dust, known as dust devils, are a feature of desert areas on Mars and on Earth. Now, a study of terrestrial dust devils has shown that around 2/3 of the fine particles lifted by these vortices can remain suspended in the atmosphere and be transported around the globe. The findings have implications for the climate and weather of both planets and, potentially, human health here on Earth.

    The study by Raack and an international team of collaborators gives important insights into the contribution of dust devils to mineral aerosols in planetary atmospheres...

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    Viewing Martian Moon Orbiting the Red Planet

    July 21, 2017, Categories  Astronomy/Space

    While photographing Mars, NASA's Hubble Space Telescope captured a cameo appearance of the tiny moon Phobos on its trek around the Red Planet. Discovered in 1877, the diminutive, potato-shaped moon is so small that it appears star-like in the Hubble pictures. Phobos orbits Mars in just 7 hours and 39 minutes, which is faster than Mars rotates. The moon's orbit is very slowly shrinking, meaning it will eventually shatter under Mars' gravitational pull, or crash onto the planet. Hubble took 13 separate exposures over 22 minutes. Credit: NASA, ESA, and Z. Levay (STScI)

    While photographing Mars, NASA’s Hubble Space Telescope captured a cameo appearance of the tiny moon Phobos on its trek around the Red Planet. Discovered in 1877, the diminutive, potato-shaped moon is so small that it appears star-like in the Hubble pictures. Phobos orbits Mars in just 7 hours and 39 minutes, which is faster than Mars rotates. The moon’s orbit is very slowly shrinking, meaning it will eventually shatter under Mars’ gravitational pull, or crash onto the planet. Hubble took 13 separate exposures over 22 minutes. Credit: NASA, ESA, and Z. Levay (STScI)

     
    The sharp eye of Hubble Space Telescope has captured the tiny moon Phobos during its orbital trek around Mars. Because the moon is so small, it appears star-like in the Hubble pictures...
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    Ancient, massive c could explain Martian geological mysteries

    July 20, 2017, Categories  Astronomy/Space

    A global false-color topographic view of Mars from the Mars Orbiter Laser Altimeter (MOLA) experiment. The spatial resolution is about 15 kilometers at the equator and less at higher latitudes, with a vertical accuracy of less than 5 meters. The figure illustrates topographic features associated with resurfacing of the northern hemisphere lowlands in the vicinity of the Utopia impact basin (at the near-center of the image in blue). Credit: MOLA Science Team

    A global false-color topographic view of Mars from the Mars Orbiter Laser Altimeter (MOLA) experiment. The spatial resolution is about 15 kilometers at the equator and less at higher latitudes, with a vertical accuracy of less than 5 meters. The figure illustrates topographic features associated with resurfacing of the northern hemisphere lowlands in the vicinity of the Utopia impact basin (at the near-center of the image in blue). Credit: MOLA Science Team

    A colossal impact with a large asteroid early in Mars’ history may have ripped off a chunk of the northern hemisphere and left behind a legacy of metallic elements in the planet’s interior. The crash also created a ring of rocky debris around Mars that may have later clumped together to form its moons, Phobos and Deimos.

    The origin and ...

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    Study Estimates Amount of Water needed to carve Martian Valleys

    June 5, 2017, Categories  Astronomy/Space

    This is a depiction of Mars today and what a warm and wet ancient Mars might have looked like. Credit: Wei Luo, Northern Illinois University

    This is a depiction of Mars today and what a warm and wet ancient Mars might have looked like. Credit: Wei Luo, Northern Illinois University

    Findings suggest Mars had ocean, active hydrologic cycle. A new study led by Northern Illinois University geography professor Wei Luo calculates the amount of water needed to carve the ancient network of valleys on Mars and concludes the Red Planet’s surface was once much more watery than previously thought. The study bolsters the idea that Mars once had a warmer climate and active hydrologic cycle, with water evaporating from an ancient ocean, returning to the surface as rainfall and eroding the planet’s extensive network of valleys.

    Satellites orbiting Mars and rovers on its surface have provided scientists with convincing evidence that water helped...

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