Content with the tag: “europa”
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Alien Safari Part 6: Generations
At the most recent NASA Astrobiology Science Conference, a panel of scientists discussed different types of planets where we might find alien life. In part six of this series, the panelists answer audience questions about the origin and evolution of life elsewhere.
Source: [Astrobiology Magazine]
March 30, 2009 / Posted by: Aaron Gronstal
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Hiding from Jupiter's Radiation
Researchers as part of NASA’s Exobiology and Evolutionary Biology program are mapping the surfaces of Jupiter’s moons Europa and Ganymede. One goal is to identify ‘dead zones’ where the powerful radiation of Jupiter would likely destroy any interesting organic compounds. The team also hopes to find areas that are possible ‘safe havens’ – where materials expelled from the moons’ subsurface oceans might survive. Such areas could be extremely important sites for future missions to the Jovian system.Source: [Astrobiology Magazine]
January 18, 2009 / Written by: Michael Schirber
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Unmasking Europa
We may not be able to judge a book by its cover, but hopefully we can judge a moon by its surface. Jupiter’s moon Europa is a primary target of astrobiology in our solar system because some scientists think it may harbor a habitable ocean beneath it’s icy crust. Richard Greenberg, professor in the Lunar and Planetary Laboratory at the University of Arizona and former member of the imaging team of NASA’s Galileo spacecraft, has now released a book about the scratched and splotchy surface of Europa.Source: [Astrobiology Magazine]
December 15, 2008 / Posted by: Aaron Gronstal -
Exploring Europa on Earth
A liquid ocean may lie hidden beneath the icy surface of Jupiter’s moon Europa. Astrobiologists theorize that hydrothermal vents at the bottom of this ocean could provide all of the ingredients needed to support life – much like the hydrothermal vents at the bottom of Earth’s oceans. Exploring such habitats on Europa won’t be as easy as it is on our own planet, which is why NASA-funded engineers from Woods Hole Oceanographic Institution plan to practice on Earth first.Source: [Astrobiology Magazine]
December 7, 2008 / Written by: Henry Bortman
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Wandering Poles on Europa
A new study in the May 15th issue of Nature from NAI’s Carnegie Institution of Washington Team reveals that Europa’s poles may not have always been located in the same place. Using images from three NASA spacecraft, Voyager, Galileo, and New Horizons, the study mapped surface features on Europa and matched them with a pattern predicted if Europa had experienced an episode of ~80 degree true polar wander. This movement of the pole and subsequent change in rotation axis is only possible if Europa’s outer shell is decoupled...
May 22, 2008 / Written by: Daniella Scalice
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Salinity of Europa's Ocean
New research from NAI’s SETI Institute Team published online in Icarus today outlines the empirical range of salt concentrations permitted for Europa’s ocean. Solutions within the range imply high, near-saturation salt concentrations and require a Europan ice shell of less than 15 km thick, with a best fit at 4 km ice thickness. The paper examines the implications for subsurface habitability.
Source: [Link]
February 26, 2007 / Posted by: Shige Abe
DDF: Geomicrobiology of a Unique Ice-Sulfur Spring Ecosystem in the High Arctic
ROADMAP OBJECTIVES: 5.1, 5.2, 5.3, 6.1, 7.1, 7.2
Surface Processes and Surface-Subsurface Transport on Europa
ROADMAP OBJECTIVES: 2.2
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iron-sulfur minerals iron concentrations iron formation iron isotope fractionation iron oxide iron oxidizing bacteria iron reduction kinetics irons-sulfur surfaces iron spectromicroscopy irradation irradiation ir spectroscopy isomerases isotope isotopes isotopic fractionation iss issol jack hills jakoba incarcerata jakoba libera jakobids jarosite journal:earth journal: journal of geophysical research journal of bacteriology journal of the american chemical society jpl jupiter kbo kbo size distribution kepler key nutrient metals kuiper belt kuiper belt objects laboratory laboratory investigation laboratory science lake lakes landsat tm data laser laser desorption lassen lassen volcanic national park late accretion late bombardment ldn 673 left-handed lefty level of analysis lexen program life life and environment life elsewhere in the universe life in extreme life in our solar system life on mars light lightning li isotopes lipids liquid liquid chromatography mass spectrometry lithic clasts lithophiles living in the microbial world: summer teacher enhancement - august 1999 lmt low-mass low-mass stars low albedo deposits lunar-like satellites lunar exploration lunar impacts m�ssbauer mafic maghemite magnesite magnet magnetic field magnetic fields magnetic fields - stars magnetite magnets main belt asteroids main belt comets maine malawimonas jakobiformis maps marco polo marine ecology marine sediments eukaryotes mars mars. mars analog mars analog. mars analogs mars analog site mars analogues mars atmosphere mars environmental chamber mars exploration mars express mars glaciers mars global surveyor mars habitability mars life mars maps mars methane mars orbiter mars reconnaissance orbiter mars rovers mars science laboratory mars time mars water martian analogues martian atmosphere martian channels martian dynamo martian meteorites martian oceans mass extinction mass extinctions mbcs mcmurdo dry valleys m dwarfs m dwarf stars media membranes mercury messenger 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organics neoproterozoic neteritics and planetary science (journal) new horizons new planets new york times nitrate nitrite nitrogenase nitrogen cycle nitrogen cycling nitrogen fixation nitrogen reduction non-el ni�o non-lte effects novel proteins npr ntiric oxide nucleic acids nucleobases numerical simulations obituary ocean ocean-bottom ocean crust ocean drilling program oceans odyssey olympus mons ophiolites opportunity optical microscopy orbital light curves oreos organic organic molecules organics organic synthesis origin of ion channels origin of life origin of transmembrane proteins origins of life origins of protein function orion nebula-like osmium isotopes outer solar system outgassing outreach oven ovens oxidation oxidative stress oxidize acetate anaerobicallly oxygen oxygenic photosynthesis oxygen isotopes ozone ozone production pah paleobiology paleoecology paleoproterozoic paleosol pan-starrs panspermia parachute parasitism past-ecosystem process model past-sea surface 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