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12-Mile-High Dust Devil Captured On Mars
2012-04-06 03:10:32

[ Watch the Video ] A Martian dust devil roughly 12 miles high (20 kilometers) was captured whirling its way along the Amazonis Planitia region of Northern Mars on March 14. It was imaged by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. Despite its height, the plume is little more than three-quarters of a football field wide (70 yards, or 70 meters). Dust devils occur on Earth as well as on Mars. They are spinning columns of air,...

NASA Mars Orbiter Catches Serpent Dust Devil On Mars
2012-03-07 13:22:09

An afternoon whirlwind on Mars lofts a twisting column of dust more than half a mile (800 meters) high in an image from the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. HiRISE captured the image on Feb. 16, 2012, while the orbiter passed over the Amazonis Planitia region of northern Mars. In the area observed, paths of many previous whirlwinds, or dust devils, are visible as streaks on the dusty surface. The active dust devil displays...

The Red Planet Experiences 'Marsquakes'
2012-02-22 11:49:17

University of London researchers report they have found evidence that Mars experiences "marsquakes" in the same way Earth does with an earthquake. The researchers said the existence of marsquakes is an indication that conditions on Mars could include liquid water. The team from the University of London used High Resolution Imaging Science Experiment (HiRISE) imagery to examine a fault system known as Cerberus Fossae. They analyzed the way boulders had fallen and rolled during...

Image 1 - Meteorite Shockwaves Cause Martian Dust Avalanches
2011-12-17 05:00:03

Dust avalanches around impact craters on Mars appear to be the result of the shock wave preceding the actual impact, according to a study led by an undergraduate student at the UA When a meteorite careens toward the dusty surface of the Red Planet, it kicks up dust and can cause avalanching even before the rock from outer space hits the ground, a research team led by an undergraduate student at the University of Arizona has discovered. "We expected that some of the streaks of dust that...

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2009-09-24 14:30:00

NASA's Mars Reconnaissance Orbiter has discovered water that could be 99 percent pure in craters halfway between the north pole and equator of Mars. "We knew there was ice below the surface at high latitudes of Mars, but we find that it extends far closer to the equator than you would think, based on Mars' climate today," said Shane Byrne of the University of Arizona, a member of the High Resolution Imaging Science Experiment, or HiRISE, which runs the high-resolution camera on NASA's Mars...

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2008-03-03 13:07:57

A NASA spacecraft in orbit around Mars has taken the first ever image of active avalanches near the Red Planet's north pole. The image shows tan clouds billowing away from the foot of a towering slope, where ice and dust have just cascaded down. The High Resolution Imaging Experiment (HiRISE) on NASA's Mars Reconnaissance Orbiter took the photograph Feb. 19. It is one of approximately 2,400 HiRISE images being released today. Ingrid Daubar Spitale of the University of Arizona, Tucson, who...

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2005-04-21 19:55:00

NASA's Mars Exploration Rover Spirit is taking movies of dust devils -- whirlwinds carrying dust -- scooting across a plain on Mars. These were taken on April 15 and April 18, and capture more movement as seen from the surface than any previous imaging of martian dust devils. "This is the best look we've ever gotten of the wind effects on the martian surface as they are happening," said Dr. Mark Lemmon, a rover team member and atmospheric scientist at Texas A&M University, College...


Word of the Day
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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