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Change of Command on the Space Station - 0 views

www.universetoday.com/...f-command-on-the-space-station scibyte72 iss Expedition32 Expedition33
shared by Mars Base on 18 Nov 12 - No Cached
  • the new crew are “newbies” with a combined in-space experience of about 3 months
  • Williams and her crew have a combined time in space of about 3 years.
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Surreal Images of Soyuz Landing in the Dark - 0 views

www.universetoday.com/...s-of-soyuz-landing-in-the-dark scibyte72 iss
shared by Mars Base on 19 Nov 12 - No Cached
  • problem with the Soyuz’ parachute – it deployed about 5 seconds later than planned – caused the crew to land several miles away from the planned landing site, but a Russian recovery team and NASA personnel reached the landing site by helicopter shortly afterward to assist the crew in getting out of the spacecraft, which landed on its side
  • 127 days in space
  • 125 days spent aboard the International Space Station
  • ...4 more annotations...
  • Expedition 34 flight engineers — NASA astronaut Tom Marshburn, Canadian Space Agency astronaut Chris Hadfield, and Russian Federal Space Agency cosmonaut Roman Romanenko — are scheduled to launch from Baikonur Dec. 19
  • for a five-month stay
  • Hadfield will become the first Canadian to command the station when Ford, Novitskiy and Tarelkin depart in March, marking the start of Expedition 35.
  • no actual footage of the Soyuz touching down, since it was dark and the spacecraft landed well away from the planned landing spot.
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Potent antibodies neutralize HIV and could offer new therapy, study finds - 0 views

medicalxpress.com/...es-neutralize-hiv-therapy.html scibyte72 HIV
shared by Mars Base on 14 Nov 12 - No Cached
  • Michel Nussenzweig's Laboratory of Molecular Immunology found that a combination of five different antibodies
  • effectively suppressed HIV-1 replication and kept the virus at bay for a 60 day period after termination of therapy
  • longer half-life
  • ...13 more annotations...
  • current antiretroviral drugs require daily intake.
  • These especially potent antibodies were only recently discovered
  • identified and cloned from HIV-infected patients whose immune systems showed an unusually high ability to neutralize HIV
  • Antibodies had been written off as a treatment for HIV/AIDS because previous studies showed only a limited effect on controlling the virus
  • before these more potent antibodies were discovered
  • HIV-1 is notorious for evading the immune system's attacks by constantly mutating
  • antibodies target HIV-1's surface protein gp160, a large molecule that forms a spike that seeks out host cells and attaches to them
  • One antibody alone wasn't enough to quell the virus; neither was a mix of three
  • five of them in unison proved too complicated for gp160 to mutate its way out of.
  • Although HIV-1 infection in humanized mice differs in many important aspects from infection in humans, the results are encouraging to investigate these antibodies in clinical trials
  • It also may be that a combination of antibodies and the already established antiretroviral therapy is more efficacious than either alone
  • could be used as a treatment one day, it is conceivable that patients would only need to take traditional drugs until the virus is controlled
  • then receive antibodies every two to three months to maintain that control
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Curiosity team switches back to Earth time - 0 views

phys.org/...2-11-curiosity-team-earth.html scibyte70 Curiosity
shared by Mars Base on 14 Nov 12 - No Cached
  • After three months working on "Mars time," the team operating NASA Mars rover Curiosity has switched to more regular hours, as planned
  • A Martian day, called a sol, is about 40 minutes longer than an Earth day, so the team's start time for daily planning has been moving a few hours later each week
  • at operations." A simultaneous change this
  • ...3 more annotations...
  • . More than 200 non-JPL scientists who have spent some time working at JPL since Curiosity's landing
  • will continue participating regularly from their home institutions throughout North America and Europe
  • The team has been preparing in recent weeks to use dispersed participation teleconferences and Web connections.
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Astronomers Find Tantalizing Hints of a Potentially Habitable Exoplanet - 0 views

www.universetoday.com/...otentially-habitable-exoplanet scibyte71 exoplanet
shared by Mars Base on 14 Nov 12 - No Cached
  • The star HD 40307, is a perfectly quiet old dwarf star, so there is no reason why such a planet could not sustain an Earth-like climate
  • HD 40307 g has been added to the Planetary Habitability Laboratory’s Habitable Exoplanets Catalog
  • now in 4th place of top exoplanets of interest based on similarity to Earth
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  • the estimated 7-Earth-mass exoplanet receives around 62-67% of the radiation that Earth gets from the Sun
  • HD 40307 g is still a candidate
  • observations are needed to not only confirm its existence but also to find out exactly what kind of planet it may be
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Astronomers find tantalizing hints of a potentially habitable exoplanet - 0 views

phys.org/...nts-potentially-habitable.html scibyte71 exoplanet
shared by Mars Base on 14 Nov 12 - No Cached
  • previously been found to hold three "super-Earth" exoplanets in close orbit
  • researchers poring over data from ESO's HARPS planet-hunting instrument are suggesting that there are likely at least six super-Earth exoplanets
  • one of them appearing
  • ...10 more annotations...
  • into the star's water-friendly "Goldilocks" zone
  • HARPS (High Accuracy Radial velocity Planet Searcher) on ESO's La Silla 3.6m telescope is a dedicated exoplanet hunter
  • detect the
  • slight wobble of a star caused by the gravitational tug of orbiting planets
  • HD 40307 g is located far enough away from its star to likely not be tidally locked
  • it wouldn't have one side subject to constant heat and radiation while its other "far side" remains cold and dark
  • the estimated 7-Earth-mass exoplanet receives around 62% of the radiation that Earth gets from the Sun
  • HD 40307 g is still a candidate—more observations are needed to not only confirm its existence but also to find out exactly what kind of planet it may be.
  • more detailed characterization of this candidate is very unlikely using ground based studies because it is very unlikely [sic] to transit the star, and a direct imaging mission seems the most promising way of learning more
  • just finding potential Earth-sized worlds in a system like HD 40307′s is a big deal for planetary scientists
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Super-Earth joins ranks in life-supporting zone | Atom & Cosmos | Science News - 0 views

www.sciencenews.org/..._ranks_in_life-supporting_zone scibyte71 exoplanet
shared by Mars Base on 14 Nov 12 - No Cached
  • Astronomers
  • have found a new candidate: a world seven times as massive as Earth in a nearby solar system.
  • planet orbits a star about 42 light-years away in the constellation Pictor
  • ...10 more annotations...
  • thought to harbor only three planets
  • sensitive data-filtering methods revealed the presence of three more
  • farthest-out of these lies in a “sweet spot
  • detected the new planets from changes in the light of the host star as the planets’ gravity tugged on it.
  • Instead of analyzing all the light from the star
  • the scientists split the light into different wavelengths to pick out the planets’ signals from those
  • able to look more deeply into the data and detect weaker signals
  • Nothing is known yet about the new planet’s physical and geochemical properties
  • a good target for a space-based imaging mission,
  • because it is so close to Earth
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