Content with the tag: “m stars”
-
Plants on Other Planets May Not be Green
Differently colored plants may live on extra-solar planets, according to two new papers in the current issue of Astrobiology authored by members of NAI’s Virtual Planetary Laboratory Alumni Team and their colleagues. They took previously simulated planetary atmospheric compositions for Earth-like planets orbiting various star types (including M stars), generated spectra, and found that photosynthetic pigments may peak in absorbance in the blue for some star types, and red-orange and near-infrared for others. Their results also suggest that, under...
April 10, 2007 / Posted by: Shige Abe
-
Habitability of Planets Around M Dwarf Stars
Multidisciplinary work from members of NAI’s SETI Institute Team and a host of collaborators across the NAI re-examines what is known at present about the potential for a terrestrial planet forming within, or migrating into, the classic liquid–surface–water habitable zone close to an M dwarf star. Their new paper, published in the current issue of Astrobiology, presents the summary conclusions of an interdisciplinary workshop sponsored by NAI and convened at the SETI Institute in 2005.
April 9, 2007 / Posted by: Shige Abe
-
Exovegetation!
NAI’s Virtual Planetary Laboratory Team have explored the possibility of detecting exovegetation on terrestrial planets orbiting M stars. They estimated the red-shift of this surface feature using leaf optical property spectra with a three photon photosynthetic scheme. The authors have produced a model wherein a pigment-derived surface signature such as exovegetation could be detected, but would be dependent upon the extent of the vegetation on the surface, cloud cover, and viewing angle. Their paper is in the current issue...
July 4, 2006 / Posted by: Shige Abe
-
Super-Earths Around M Dwarf Stars - Competing Theories
Alan Boss of NAI’s Carnegie Institution of Washington Team published in the current issue of the Astrophysical Journal a new look at the origin of super-Earths orbiting M dwarf stars. The core accretion mechanism of giant planet formation has been used to explain the presence of these planets. Boss’ new work shows they could also have been formed by the disk instability mechanism.
June 6, 2006 / Posted by: Shige Abe
- 2008 aas abiogenic abscicon aerobic akila akilia island algae allan hills alpha centauri alvin amase american astronomical society amino acids anaerobic antarctica antartica antennas archaea archea archean arctic area 9 aromatic astrobiology drilling program astrobiology journal astrobiotechnology astrochemistry astronaut astronomical journal astrophysical journal astrophysical journal letters atacama atlantis atmosphere atmospheric chemistry australia australian centre for astrobiology auv awards axis bacteria bacteriorhodopsin binaries biofilms biomarkers biome biosignatures books britian brown dwarfs cambrian canada canyon canyons carbonate rocks carbonates carbon dioxide cassini cells chemostratigraphy chile chimpanzee china chip chiral citations cnn collaborative technology colors comet comets comics complex life conference core accretion cyanobacteria dance data databases ddf depthx director diversity dna dolphin drilling dust dwarf star ea early earth early mars earth earth and planetary science letters earth and planetary science letters (journal) education electronic arts enceladus encyclopedia of life endourance endurance england enzyme enzymes erosion esa ethane eukaryotes europa evolution evolution and environment exobiology exoplanet exoplanets expose express extremeophiles extremephiles extremophiles fiction flood fossils frogs funding fungi fuse future of life galileo games ganymede gas gas giants geobiology (journal) geology (journal) geysers giant planets glacier glaciers great oxidation even great oxidation event greenland gsfc guerrero negro habitability habitable planets habitable zone habitablity in the universe hadean hawaii hawaii team high angular resolution homochirality hubble human hydrocarbons hydrogen hydrogen peroxide hydrogen sulfide hydrothermal vent hydrothermal vents hyperion hyperthermophilic ice iceland idaho information technology instruments international space station iron isotope isotopes iss jack hills journal:earth journal: journal of geophysical research journal of bacteriology journal of the american chemical society jpl jupiter kepler laboratory lakes lassen left-handed lefty life and environment life elsewhere in the universe life in our solar system lipids liquid magnet magnets maps marine ecology mars mars express mars global surveyor mars orbiter mars reconnaissance orbiter mars rovers martian atmosphere martian oceans mass extinctions m dwarf stars membranes mercury messenger meteorites meteors meterite meterorites methane methanogen mexico microbes microbialite microbialites microbial life microbial mats microbiology microlensing microscopy mirs missions mojave molecular biology and evolution (journal) molybdenum moon moon and planets moons mro m star m stars murchison music nai arc team nai asu team nai berkeley team nai cal team nai ciw team nai cub team nai gsfc team nai har team nai hawaii team nai iptai team nai mbl team nai minority institution research support nai mit team nai montana team nai msu team nai postdoctoral fellow nai psu team nai seti team nai ua team nai ucb team nai ucla team nai uh team nai uri team nai uw team nai virus focus group nai vpl at jpl nai vpl at jpl team nai vpl at uw team nai wisconsin team nanoparticles nasa arc nasa jpl nasa tv nature (journal) near near earth asteroid rendezvous neoproterozoic neteritics and planetary science (journal) new horizons new york times nitrogen fixation npr nucleic acids obituary ocean ocean-bottom ocean drilling program oceans odyssey opportunity origin of life origins of life oven ovens oxygen ozone pah paleoproterozoic parachute pavilion lake pbs perchlorate permafrost permian philosophy phoenix phoenix mission phosphorus photosynthesis planetary protection planet formation planet migration planets plankton plants pnas poles poster pre–main‐sequence precambrian precambrian research (journal) primer probe proceedings of the national academy of sciences (journal) prokaryotes propane proteins proteobacteria proterozoic protoplanetary disk pyruvic acid quartet radio raman spectroscopy reptiles rio tinto rise of oxygen robatic robot robotic robotics robots rover rovers rrna salt samples saturn science (journal) scientific american (journal) second life segan medal serpentinization shoemaker signatures of life sinkhole snowball earth soil solar panel south africa space shuttle space telescope science institute spitzer space telescope spore stardust sterols subsurface sulfate reduction sulfides sulfur sun super earths supergiant star tega teraforming terrestrial terrestrial planet formation terrestrial planets thermal and evolved-gas analyzer thermometer time titan titanium tweets twitter uk underwater united kingdom vegetation venus video viking viruses volcanoes voyager wall street journal water web 2.0 website websites wet-chemistry workbook yeast yellowstone zircon zircons zoe
