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Mars Base

Tall, Devilish Storm Skids Across Mars' Surface - Science News - 0 views

www.sciencenews.org/...s_across_Mars%E2%80%99_surface

AprMedia mars tornado

shared by Mars Base on 10 Apr 12 - No Cached
  • Stretching 20 kilometers up from the planet’s surface
  • dust devil recently caught in action on Mars
  • What’s interesting about this dust devil is it’s very, very tall
  • ...3 more annotations...
  • To see one this size is very rare
  • Mars Reconnaissance Orbiter took the lucky photograph using a high-resolution camera called HiRISE
  • March 14, the camera spotted the dust devil leaving a trail across land in Mars’ northern hemisphere, where spring brings temperatures of up to -25° Celsius in some places
Mars Base

ScienceShot: Hubble Spots Auroras on Uranus - ScienceNOW - 0 views

news.sciencemag.org/...shot-hubble-spots-auroras.html

AprMedia scibyte43 hubble uranus

shared by Mars Base on 18 Apr 12 - No Cached
  • auroral glows in the atmosphere above our planet can flicker for hours
  • those seen on the planet's sunlit side—apparently last for only a couple of minutes
  • Researchers caught their first glimpse of the brief auroras from our planet's neighborhood with the Hubble Space Telescope in November 2011, 3 months after a strong gust in the solar wind raced past Earth on its way to Uranus
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  • Previously, scientists had observed the planet's auroras only once, during a Voyager flyby in 1986
  • instruments had a much better view of the glows
  • lasted longer, covered a larger area, and festooned the unlit side of Uranus
  • other factors were different
  • planet's rotational axis was pointed almost directly at the sun
  • in 2011 the axis lay almost perpendicular to the flow of solar wind
  • new observations should help scientists better understand Uranus's odd magnetic field, whose axis is both offset from the center of the planet and tilts at an angle of 60° from the rotational axis.
Mars Base

ScienceShot: Counting Penguins From Space - ScienceNOW - 0 views

news.sciencemag.org/...nceshot-counting-penguins.html

AprMedia scibyte43 penguins

shared by Mars Base on 18 Apr 12 - No Cached
  • Counting penguins isn't as hard as it might sound.
  • Someone snaps a photograph of a colony and then marks up the picture to make sure that they aren't missing or double counting anybody
  • What is hard is getting to remote places, especially Antarctica
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  • also came across seven new colonies (one shown at left), bringing the total to 44
  • Scientists have found twice as many emperor penguins (Aptenodytes forsteri) as previously thought to exist, roughly 595,000 (plus or minus 81,000
  • a new approach is to use satellite images, and today researchers report the results of the first such comprehensive stu
Mars Base

Space Shuttle Discovery Enters Smithsonian for Museum Display | NASA Shuttle Retirement... - 0 views

www.space.com/covery-smithsonian-museum.html

scibyte43 shuttle discovery AprMedia

shared by Mars Base on 20 Apr 12 - No Cached
  • Mars Base on 20 Apr 12
     
    ted with technological and scientific achievements, including the launch of the Hubble Space Telescope into orbit in 1990 and the deployment of the Ulysses solar probe the same year. The fleet leader, Discovery also returned the space shuttle program to flight after the losses of Challenger and Columbia in 1986 and 2003, respectively.
Mars Base

Hubble Reveals Curious Auroras on Uranus - 0 views

www.universetoday.com/...eals-curious-auroras-on-uranus

AprMedia scibyte43 hubble uranus

shared by Mars Base on 20 Apr 12 - No Cached
  • an international team of astronomers
  • spotted two instances of auroras on the distant planet… once on November 16 and again on the 29th.
  • Uranus — which has an 84-year-long orbit
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  • Further investigations of Uranus’ auroras and magnetic field can offer insight into the dynamics of Earth’s own magnetosphere and how it interacts with the solar wind, which in turn affects our increasingly technological society.
Mars Base

Auroras Seen on Uranus For First Time - 0 views

news.nationalgeographic.com/...s-auroras-science-space-hubble

AprMedia scibyte43 hubble uranus

shared by Mars Base on 20 Apr 12 - No Cached
  • Two fleeting, Earth-size auroral storms were imaged by the Hubble Space Telescope as they flared up on the dayside of the gas giant in November 2011. (
  • Auroras tend to surround a planet's poles, where magnetic field lines converge and funnel incoming charged solar particles into the planet's atmosphere. There, the particles collide with air molecules, making the molecules glow
  • Scientists tried unsuccessfully to detect auroras on Uranus in 1998 and 2005
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  • team learned of an impending solar storm directed toward Uranus, which sits about 2.5 billion miles (4 billion kilometers) from Earth.
  • timed their Hubble observations specifically to coincide with the solar storm, and about six weeks later, Hubble spotted the auroras flaring up in Uranus's upper atmosphere
  • the other seven planets, Uranus's magnetic axis is 60 degrees off from its spin axis
  • spin axis itself has a bizarre 98-degree tilt relative to the solar system's orbital plane
  • , the planet seems to roll around on its side as it orbits the sun.
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