Summary: Any solid objects moving in interplanetary space that are smaller than a planet or asteroid but larger than a molecule. Meteorites are any meteoroid that has fallen to a planetary surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Publications200 found, 100 shown here
- How and where did life on Earth arise?Carl Zimmer
Science 309:89. 2005
- Martian surface paleotemperatures from thermochronology of meteoritesDavid L Shuster
Division of Geological and Planetary Sciences, California Institute of Technology, 100 23, Pasadena, CA 91125, USA
Science 309:594-600. 2005..Our calculations also suggest that for most of the past 4 billion years, ambient near-surface temperatures on Mars are unlikely to have been much higher than the present cold (<0 degrees C) state...
- Interferometric observations of large biologically interesting interstellar and cometary moleculesLewis E Snyder
Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801, USA
Proc Natl Acad Sci U S A 103:12243-8. 2006..Major advances in understanding the formation chemistry of hot core species can come from observations with the next generation of sensitive, high-resolution arrays...
- Detection of methane in the atmosphere of MarsVittorio Formisano
Istituto di Fisica dello Spazio Interplanetario INAF IFSI, Via del Fosso del Cavaliere 100, 00133 Rome, Italy
Science 306:1758-61. 2004..However, the mixing ratio varies between 0 and 30 ppbv over the planet. The source of methane could be either biogenic or nonbiogenic, including past or present subsurface microorganisms, hydrothermal activity, or cometary impacts...
- Search for EPR markers of the history and origin of the insoluble organic matter in extraterrestrial and terrestrial rocksDidier Gourier
Ecole Nationale Supérieure de Chimie de Paris ENSCP, Laboratoire de Chimie appliquée de l Etat Solide, UMR CNRS 7574, 11 rue Pierre et Marie Curie, 75231 Paris 05, France
Spectrochim Acta A Mol Biomol Spectrosc 60:1349-57. 2004..We conclude from this result that the organic matter in the oldest cherts (3.5 billion years) has the same age as their SiO2 matrix, and is not due to a latter contamination by bacteria, as was recently found in meteoritic samples...
- The universe: a cryogenic habitat for microbial lifeChandra Wickramasinghe
Cardiff Centre for Astrobiology, Cardiff University, 2 North Road, Cardiff CF10 3DY, UK
Cryobiology 48:113-25. 2004..The ancient theory of panspermia may be on the verge of vindication, in which case the entire universe would be a grand crucible of cryomicrobiology...
- Necessary, but not sufficient: Raman identification of disordered carbon as a signature of ancient lifeJill Dill Pasteris
Department of Earth and Planetary Sciences, Washington University, St Louis, Missouri 63130 4899, USA
Astrobiology 3:727-38. 2003..Clearly, the fact that small, opaque grains consist of disordered carbonaceous material is necessary, but not sufficient, to prove them to be residues of cellular material and, thus, biogenic...
- On the survivability and detectability of terrestrial meteorites on the moonIan A Crawford
Birkbeck UCL Research School of Earth Sciences, London, United Kingdom
Astrobiology 8:242-52. 2008..5 km/s) or oblique (<or=45 degrees) impacts, or both. We outline possible mechanisms for locating such materials on the Moon and conclude that searching for them would be a scientifically valuable activity for future lunar exploration...
- Questioning the oldest signs of lifeSarah Simpson
Sci Am 288:70-7. 2003
- Searching for life in the Universe: unconventional methods for an unconventional problemK H Nealson
University of Southern California, Los Angeles, CA 90089, USA
Int Microbiol 5:223-30. 2002....
- The Perseus Exobiology mission on MIR: behaviour of amino acids and peptides in Earth orbitF Boillot
Centre de Biophysique Moleculaire, rue Charles Sadron, 45071 Orleans Cedex 2, France
Orig Life Evol Biosph 32:359-85. 2002..The possible exogenous origin of biological building blocks is discussed with respect to the stability to the molecules and the nature of the associated minerals...
- Chemical markers for bacteria in extraterrestrial samplesAlvin Fox
Department of Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia 29208, USA
Anat Rec 268:180-5. 2002..Such analyses may also be important in studies designed to search for the presence of life on Mars...
- Germs in space. Joshua Lederberg, exobiology, and the public imagination, 1958-1964Audra J Wolfe
Rutgers University Press, 100 Joyce Kilmer Avenue, Piscataway, New Jersey 08854, USA
Isis 93:183-205. 2002....
- Lithopanspermia in star-forming clustersFred C Adams
Michigan Center for Theoretical Physics, Physics Department and Astronomy Department, University of Michigan, Ann Arbor, Michigan 48109, USA
Astrobiology 5:497-514. 2005..Finally, we discuss the question of internal versus external seeding of clusters and the possibility of Earth seeding young clusters over its biologically active lifetime...
- Astrobiology science conference. Astrobiologists try to 'follow the water to life'Robert Irion
Science 296:647-8. 2002
- Laboratory investigations of the survivability of bacteria in hypervelocity impactsM J Burchell
Unit for Space Sciences and Astrophysics, University of Kent at Canterbury, Kent CT2 7NR, UK
Adv Space Res 28:707-12. 2001..This crudely simulated aero-capture in a planetary atmosphere. No evidence for Rhodococcus growth was found from the projectiles captured in the aerogel from any of the four shots...
- Solar system exploration. Planetary science's defining momentAndrew Lawler
Science 295:32-7. 2002
- Critical issues in connection with human missions to Mars: protection of and from the Martian environmentG Horneck
German Aerospace Center DLR, Institute of Aerospace Medicine, Cologne, Germany
Adv Space Res 31:87-95. 2003..Records of human activities on the planet's surface should be maintained in sufficient detail that future scientific experimenters can determine whether environmental modifications have resulted from explorations...
- Functions and possible provenance of primordial proteinsAndrei P Sommer
Central Institute of Biomedical Engineering, University of Ulm, 89081 Ulm, Germany
J Proteome Res 3:1296-9. 2004..An analysis of the slime's biological functions may lead to novel strategies suitable to block adhesion modalities in modern bacterial populations...
- Observations from a 4-year contamination study of a sample depth profile through Martian meteorite NakhlaJan Toporski
Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC, USA
Astrobiology 7:389-401. 2007..Time-resolved in situ observations further allow observation of possible (bio)dynamics within the system...
- Lunar and planetary science conference. New signs of ancient life in another Martian meteorite?Richard A Kerr
Science 311:1858-9. 2006
- Planetary science: clays in the history of MarsHorton Newsom
Nature 438:570-1. 2005
- Did life come from another world?David Warmflash
University of Houston, USA
Sci Am 293:64-71. 2005
- Was Earth ever infected by martian biota? Clues from radioresistant bacteriaAnatoly K Pavlov
Laboratory of Nuclear and Space Physics, Ioffe Physico Technical Institute of Russian Academy of Sciences, St Petersburg, Russia
Astrobiology 6:911-8. 2006..Our mechanism implies multiple and frequent exchanges of biota between Mars and Earth...
- Planetary science. Mars Orbiter's swan song: the red planet is a-changin'Richard A Kerr
Science 314:1528-9. 2006
- Present-day impact cratering rate and contemporary gully activity on MarsMichael C Malin
Malin Space Science Systems, Post Office Box 910148, San Diego, CA 92191 0148, USA
Science 314:1573-7. 2006..The observations suggest that liquid water flowed on the surface of Mars during the past decade...
- Deep Impact observations by OSIRIS onboard the Rosetta spacecraftHorst Uwe Keller
Max Planck Institut für Sonnensystemforschung, Max Planck Strasse 2, 37191 Katlenburg Lindau, Germany
Science 310:281-3. 2005..Dust Afrho values before and long after the impact confirm the slight decrease of cometary activity. The dust-to-water mass ratio was much larger than 1...
- Aqueous corrosion of phosphide minerals from iron meteorites: a highly reactive source of prebiotic phosphorus on the surface of the early EarthMatthew A Pasek
Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona 85721, USA
Astrobiology 5:515-35. 2005..Phosphonate oxidation is rapid in the presence of Fe metal but negligible in the presence of magnetite and in the control sample. The rate of hypophosphite oxidation is independent of reaction substrate...
- Impact seeding and reseeding in the inner solar systemBrett Gladman
Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada
Astrobiology 5:483-96. 2005..Early bacterial life on Earth could have been safeguarded from any purported impact-induced extinction by temporary refuge in space...
- Supernova antineutrino interactions cause chiral symmetry breaking and possibly homochiral biomaterials for lifeDavid B Cline
Astrophysics Division, Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
Chirality 17:S234-9. 2005..The weak interaction breaks chiral symmetry, but a robust process is needed. We propose that, in an SNII explosion, antineutrinos could provide this mechanism in the solar cloud. Pre-simple estimates of this possibility are given here...
- Organics captured from comet 81P/Wild 2 by the Stardust spacecraftScott A Sandford
Astrophysics Branch, NASA Ames Research Center, Moffett Field, CA 94035, USA
Science 314:1720-4. 2006..Although the variable extent of modification of these materials by impact capture is not yet fully constrained, a diverse suite of organic compounds is present and identifiable within the returned samples...
- Biological space experiments for the simulation of Martian conditions: UV radiation and Martian soil analoguesP Rettberg
DLR, Institute of Aerospace Medicine, Radiation Biology Section, Linder Hohe, Koln, Germany
Adv Space Res 33:1294-301. 2004....
- Deep UV Raman imaging for astrobiologyBarry E DiGregorio
Anal Chem 79:798. 2007
- Comparison of methods for measurement of organic compounds at ultra-trace level: analytical criteria and application to analysis of amino acids in extraterrestrial samplesO Vandenabeele-Trambouze
Organisation Moleculaire, evolution et materiaux fluores, UMR CNRS 5073, Universite Montpellier II, Montpellier, 2 Place E Batallion 34195 Montpellier Cedex 5, France
Astrobiology 5:48-65. 2005..We emphasize the need to standardize the description of future analyses, and take the first step toward a proposed international laboratory network for performance testing...
- Delivery of extraterrestrial amino acids to the primitive Earth. Exposure experiments in Earth orbitB Barbier
Centre de Biophysique Moleculaire, CNRS, Orleans, France
Biol Sci Space 12:92-5. 1998..The results obtained in BIOPAN-1 and BIOPAN-2 exposure experiments on board unmanned satellite FOTON are presented...
- [Meteoritics and mineralogy on possible ancient Martian life]A Tsuchiyama
Department of Earth and Space Science, Osaka University, Japan
Biol Sci Space 10:262-70. 1996..1996) is controversial, and could be formed by non-biogenic processes. Thus, further study of ALH84001 and other martian meteorites is required. We also need to consider the future Mars mission especially sample return mission...
- Planetary interchange of bioactive material: probability factors and implicationsB C Clark
Lockheed Martin Astronautics, POB 179, Denver, CO 80201, USA
Orig Life Evol Biosph 31:185-97. 2001..PIBM considerations apply to both the solar system locale(s) of the origin of life and to the applicability of planetary protection protocols to preserve the biospheres of planetary bodies, including our own...
- Past, present, and future life on MarsC P McKay
Space Science Division, NASA Ames Research Center, Moffett Field, CA, USA
Gravit Space Biol Bull 11:41-50. 1998..In the longer term, it is possible that in the future we might restore a habitable climate on Mars, returning it to the life-bearing state it may have enjoyed early in its history...
- Possible cometary origin of heavy noble gases in the atmospheres of Venus, Earth and MarsT Owen
University of Hawaii, Institute for Astronomy, Honolulu 96822
Nature 358:43-6. 1992..If true, this hypothesis illustrates the importance of impacts in determining the volatile inventories of these planets...
- Collisional erosion and the non-chondritic composition of the terrestrial planetsHugh St C O'Neill
Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia
Philos Trans A Math Phys Eng Sci 366:4205-38. 2008..But the lower radiogenic heat production exacerbates the discrepancy with heat loss...
- The carbon budget in the outer solar nebulaD P Simonelli
Space Science Division, NASA Ames Research Center, Moffett Field, California 94035, USA
Icarus 82:1-35. 1989..We conclude that the majority of the carbon in the outer solar nebula was in gaseous CO; 10% to a few tens of percent of the C was in condensed organic materials; and at least a trace amount of carbon was in methane gas...
- Origin of Saturn's rings and inner moons by mass removal from a lost Titan-sized satelliteRobin M Canup
Planetary Science Directorate, Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, Colorado 80302, USA
Nature 468:943-26. 2010..water ice, which implies that initially they were almost pure ice because they are continually polluted by rocky meteoroids. In contrast, a half-rock, half-ice mixture (similar to the composition of many of the satellites in the outer ..
- Planetary resources and astroecology. Planetary microcosm models of asteroid and meteorite interiors: electrolyte solutions and microbial growth--implications for space populations and panspermiaMichael N Mautner
Soil, Plant and Ecological Sciences Division, Lincoln University, Lincoln, New Zealand
Astrobiology 2:59-76. 2002..The results also suggest that protoplanetary nebulae can support and disperse microorganisms and can be therefore effective environments for natural and directed panspermia...
- Meteorites: messengers from the early solar systemBeda A Hofmann
Natural History Museum Bern, Earth Science Department Bern
Chimia (Aarau) 64:736-40. 2010..The present high find rate likely represents a unique short-term event, asking for a careful management of this scarce scientific resource...
- Chemical evolution of primitive solar system bodiesJ Oro
Department of Biochemical and Biophysical Sciences, The University of Houston, TX 77004
Adv Space Res 9:105-20. 1989..Some of the outstanding problems concerning the synthesis of organic molecules on different cosmic bodies are also discussed from an exobiological perspective...
- A unique basaltic micrometeorite expands the inventory of solar system planetary crustsMatthieu Gounelle
, , , CP52, 57 rue Cuvier, 75005 Paris, France
Proc Natl Acad Sci U S A 106:6904-9. 2009..The ability to retrieve such a wealth of information from this tiny (a few micrograms) sample is auspicious some years before the launch of a Mars sample return mission...
- Meteorite Kr in Earth's Mantle Suggests a Late Accretionary Source for the AtmosphereGreg Holland
School of Earth, Atmospheric, and Environmental Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, UK
Science 326:1522-5. 2009....
- Composition of the Earth's interior: the importance of early eventsRichard W Carlson
Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, USA
Philos Trans A Math Phys Eng Sci 366:4077-103. 2008..The enriched reservoir may now be confined to the base of the mantle owing to a combination of compositionally induced high density and low viscosity, both of which allow only minimal entrainment into the overlying convecting mantle...
- Volatiles in interplanetary dust particles: a reviewE K Gibson
Planetary Science Branch, NASA Johnson Space Center, Houston, Texas
J Geophys Res 97:3865-75. 1992..Recovery and analysis of interplanetary dust particles have opened new opportunities for analysis of primitive materials, although interplanetary dust particles represent major challenges to the analyst because of their small size...
- Conversations: with Carl Pilcher [interview by Johan Benson]C Pilcher
NASA Headquarters, Washington, DC, USA
Aerosp Am 36:16-8. 1998..cooperation with the Japanese space agency, the status of the search for extraterrestrial life in solar system meteoroids and asteroids, mission size for more in-depth exploration, reports of water on the moon, and the exploration of ..
- Formation of uracil from the ultraviolet photo-irradiation of pyrimidine in pure H2O icesMichel Nuevo
NASA Ames Research Center, Space Science Division, Moffett Field, California 94035, USA
Astrobiology 9:683-95. 2009....
- Heterogeneous accretion and the moderately volatile element budget of EarthM Schönbächler
School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK
Science 328:884-7. 2010..The Moon-forming giant impact probably involved the collision with a Mars-like protoplanet that had an oxidized mantle, enriched in moderately volatile elements...
- Extraterrestrial flux of potentially prebiotic C, N, and P to the early EarthMatthew Pasek
NAI LaPlace, University of Arizona, 1629 E University Blvd, Tucson, AZ 85721, USA
Orig Life Evol Biosph 38:5-21. 2008..These results help elucidate the potential role of extraterrestrial matter in the origin of life...
- Are some chondrule rims formed by impact processes? Observations and experimentsT E Bunch
NASA Ames Research Center, Moffett Field, California 94035, USA
Icarus 91:76-92. 1991..Therefore, experiments using appropriately chosen projectile and target materials can provide a test of the hypothesis that chondrule rims common to Weston and possibly other ordinary chondrites were formed by such a process...
- The fate of amino acids during simulated meteoritic impactMarylène Bertrand
Centre de Biophysique Moléculaire CNRS affiliated with the University of Orléans, 45071 Orleans, France
Astrobiology 9:943-51. 2009..Some chiral amino acids experienced partial racemization during the course of the experiment. Our data indicate that impact shock may act as a selective filter to the delivery of extraterrestrial amino acids via carbonaceous chondrites...
- Survival of microorganisms in space protected by meteorite material: results of the experiment 'EXOBIOLOGIE' of the PERSEUS missionP Rettberg
DLR, Institute of Aerospace Medicine, Koln, Germany
Adv Space Res 30:1539-45. 2002....
- Photometric behavior of comet Hale-Bopp (C/1995 O1) before perihelionD G Schleicher
Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA
Science 275:1913-5. 1997..The chemical composition of Hale-Bopp is consistent with that of other long-period comets originating from the Oort Cloud...
- Spherule beds 3.47-3.24 billion years old in the Barberton Greenstone Belt, South Africa: a record of large meteorite impacts and their influence on early crustal and biological evolutionDonald R Lowe
Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305 2115, USA
Astrobiology 3:7-48. 2003..26-3.24 Ga and approximately 2.65-2.5 Ga suggests either spikes in impact rates during the Archean or that the entire Archean was characterized by terrestrial impact rates above those currently estimated from the lunar cratering record...
- Chondrites isp. indicating late paleozoic atmospheric anoxia in Eastern Peninsular IndiaBiplab Bhattacharya
Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
ScientificWorldJournal 2014:434672. 2014..Such anoxia is interpreted as intermittent falls in oxygen level in an overall decreasing atmospheric oxygenation within the late Paleozoic global oxygen-carbon dioxide fluctuations...
- Chemical evolution and meteorites: an updateSandra Pizzarello
Arizona State University, Tempe, AZ 85287, USA
Orig Life Evol Biosph 34:25-34. 2004....
- Hot tempers, hard coreRex Dalton
Nature 425:13-4. 2003
- Spectroscopic identification of carbonate minerals in the martian dustJoshua L Bandfield
Department of Geological Sciences, Arizona State University, Tempe, AZ 85287 6305, USA
Science 301:1084-7. 2003....
- Geochemical evidence for magmatic water within Mars from pyroxenes in the Shergotty meteoriteH Y McSween
Department of Geological Sciences, University of Tennessee, Knoxville 37996, USA
Nature 409:487-90. 2001..We conclude that ascending magmas possibly delivered significant quantities of water to the martian surface in recent times, reconciling geologic and petrologic constraints on the outgassing history of Mars...
- Chicxulub and climate: radiative perturbations of impact-produced S-bearing gasesElisabetta Pierazzo
Planetary Science Institute, Tucson, Arizona 85705 8331, USA
Astrobiology 3:99-118. 2003....
- L-amino acids catalyze the formation of an excess of D-glyceraldehyde, and thus of other D sugars, under credible prebiotic conditionsRonald Breslow
Department of Chemistry, Columbia University, New York, NY 10027, USA
Proc Natl Acad Sci U S A 107:5723-5. 2010..The D/L glyceraldehyde ratio in water solution is amplified to 92/8 using simple selective solubilities of the D and the DL forms. This D center would then be carried into the prebiotic syntheses of larger sugars...
- Amino acid distribution in meteorites: diagenesis, extraction methods, and standard metrics in the search for extraterrestrial biosignaturesGene D McDonald
Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas, USA
Astrobiology 6:17-33. 2006..We present here one such metric determined by sequential feature extraction and normalization (PCA), information-driven automated exploration of classification possibilities (HCA), and prediction of classification accuracy (ANNs)...
- Soil moisture retrieval from optical and thermal spaceborne remote sensingW W Verstraeten
Laboratory of Soil and Water Management, Katholieke Universiteit Leuven, Belgium
Commun Agric Appl Biol Sci 70:27-30. 2005
- Asteroidal water within fluid inclusion-bearing halite in an H5 chondrite, Monahans (1998)M E Zolensky
Mail Code SN2, NASA Johnson Space Center, Houston, TX 77058, USA
Science 285:1377-9. 1999..Two possible origins for the brines are indigenous fluids flowing within the asteroid and exogenous fluids delivered into the asteroid surface from a salt-containing icy object...
- A reduced estimate of the number of kilometre-sized near-Earth asteroidsD Rabinowitz
Yale University Physics Department, New Haven, Connecticut 06511, USA
Nature 403:165-6. 2000..We find that the total number of asteroids with diameters > 1 km is about half the earlier estimates. At the current rate of discovery of near-Earth asteroids, 90% will probably have been detected within the next 20 years...
- The missing organic molecules on MarsS A Benner
Departments of Chemistry, Anatomy, and Cell Biology, University of Florida, Gainesville, FL 32611, USA
Proc Natl Acad Sci U S A 97:2425-30. 2000..Missions should seek these and recognize that these complicate the search for organics from entirely hypothetical Martian life...
- The PROCESS experiment: exposure of amino acids in the EXPOSE-E experiment on the international space station and in laboratory simulationsM Bertrand
Centre de Biophysique Moleculaire, CNRS, rue Charles Sadron, Orleans cedex 2, France
Astrobiology 12:426-35. 2012..Our results also demonstrate the protective effect of meteorite powder, which reemphasizes the importance of exogenic contribution to the inventory of prebiotic organics on early Earth...
- Hydrogen isotopes in lunar volcanic glasses and melt inclusions reveal a carbonaceous chondrite heritageAlberto E Saal
Department of Geological Sciences, Brown University, Providence, RI 02912, USA
Science 340:1317-20. 2013....
- Evidence for supernova injection into the solar nebula and the decoupling of r-process nucleosynthesisGregory A Brennecka
Lawrence Livermore National Laboratory, Livermore, CA 94550
Proc Natl Acad Sci U S A 110:17241-6. 2013..A scenario of late supernova injection into the protoplanetary disk is consistent with formation of our Solar System in an active star-forming region of the galaxy. ..
- Vibrational spectroscopy of ion-irradiated icesG Strazzulla
Osservatorio Astrofisico di Catania, Italy
Spectrochim Acta A Mol Biomol Spectrosc 57:825-42. 2001..Furthermore we present the micro-Raman spectra of some fragments of Orgueil a carbonaceous chondrite meteorite. Some astrophysical applications of these laboratory results are also discussed...
- Evidence against a chondritic EarthIan H Campbell
Research School of Earth Science, Australian National University, Canberra, Australian Capital Territory 0200, Australia
Nature 483:553-8. 2012..Either the matter from which the Earth formed was not chondritic, or the Earth has lost matter by collisional erosion in the later stages of planet formation...
- Large enantiomeric excesses in primitive meteorites and the diverse effects of water in cosmochemical evolutionSandra Pizzarello
Arizona State University, Department of Chemistry and Biochemistry, Tempe, AZ 85287 1604, USA
Proc Natl Acad Sci U S A 109:11949-54. 2012..However, aqueous alteration appears to affect CR soluble organic composition and abundances, in particular some diastereomeric amino acids may gauge its extent by the consequent racemization of their ee...
- Planetary science. A unique chunk of the MoonRandy L Korotev
Department of Earth and Planetary Sciences, Washington University in St Louis, St Louis, MO 63130, USA
Science 305:622-3. 2004
- The first living systems: a bioenergetic perspectiveD W Deamer
Department of Chemistry and Biochemistry, University of California, Santa Cruz 95064, USA
Microbiol Mol Biol Rev 61:239-61. 1997..Despite this progress, there is still no clear mechanism by which the free energy of light, ion gradients, or redox potential can be coupled to polymer bond formation in a protocellular structure...
- Observations of ejecta clouds produced by impacts onto Saturn's ringsMatthew S Tiscareno
Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA
Science 340:460-4. 2013..The responsible interplanetary meteoroids were initially between 1 centimeter and several meters in size, and their influx rate is consistent with the ..
- The origin of the EarthS R Taylor
Department of Nuclear Physics, Australian National University, Canberra, Australia
AGSO J Aust Geol Geophys 17:27-31. 1997..The strange density and chemistry of the Moon are consistent with an origin from the mantle of the impactor. Core-mantle separation on the Earth was coeval with accretion. Some speculations are given on the origin of the hydrosphere...
- Catalytic effects of Murchison material: prebiotic synthesis and degradation of RNA precursorsRaffaele Saladino
Department of Agrobiology and Agrochemistry, University of Tuscia, Viterbo, Italy
Orig Life Evol Biosph 41:437-51. 2011..These results suggest that if RNA was somehow incorporated into a primitive form of RNA-based thermophilic life, either it must be protected from random hydrolytic events, or the rate of synthesis must exceed the rate of hydrolysis...
- Conception of the 'Chirality-Experiment' on ESA's mission ROSETTA to comet P46/WirtanenW H Thiemann
Dept. Phys. Chemistry, University of Bremen, Leobenerstrasse, D-28359 Bremen, Germany
Adv Space Res 27:323-8. 2001..As a consequence of COSAC's 'Chirality-Experiment' far-reaching results are expected to investigate the various hypotheses about the first asymmetric synthesis...
- Amino acids from ultraviolet irradiation of interstellar ice analoguesG M Munoz Caro
Raymond and Beverly Sackler Laboratory for Astrophysics at Leiden Observatory, PO Box 9513, NL 2300 RA Leiden, The Netherlands
Nature 416:403-6. 2002....
- Lunar polar ice deposits: scientific and utilization objectives of the Lunar Ice Discovery Mission proposalMichael B Duke
Lunar and Planetary Institute, Houston, Texas 77058, USA
Acta Astronaut 50:379-83. 2002..The lunar polar rover remains the best way to understand the distribution and characteristics of lunar polar ice...
- Dark matter in the outer solar systemT Owen
University of Hawaii Institute for Astronomy, Honolulu 96822, USA
Adv Space Res 16:41-9. 1995..Three absorptions in the spectrum of the unusually red planetesimal 5145 Pholus are well-established, but their identity remains a mystery...
- Kinetic studies of atmospherically relevant silicon chemistry. Part III: Reactions of Si+ and SiO+ with O3, and Si+ with O2Juan C Gómez Martín
School of Chemistry, University of Leeds, LS2 9JT, UK
Phys Chem Chem Phys 13:3764-74. 2011..ions are generated in the Earth's upper atmosphere by hyperthermal collisions of material ablated from incoming meteoroids with atmospheric molecules, and from charge transfer of silicon-bearing neutral species with major atmospheric ..
- Indication of global deforestation at the Cretaceous-Tertiary boundary by New Zealand fern spikeV Vajda
Department of Geology, Lund University, Tornavägen 13, SE 223 63 Lund, Sweden
Science 294:1700-2. 2001..Recovery of New Zealand plant communities followed a pattern consistent with major climatic perturbations occurring after an impact winter that was possibly preceded by global wildfires...
- Non-racemic amino acids in the Murray and Murchison meteoritesS Pizzarello
Department of Chemistry and Biochemistry, Arizona State University, Tempe 85287 1604, USA
Geochim Cosmochim Acta 64:329-38. 2000....
- Life in the solar systemA Brack
Centre de Biophysique Moleculaire, CNRS, Orleans, France
Adv Space Res 24:417-33. 1999..One-handed complex molecules and preferential isotopic fractionation of carbon, common to all terrestrial life forms, can be used as basic indicators when searching for life beyond the Earth...
- Epitaxial growth of nanophase magnetite in Martian meteorite Allan Hills 84001: implications for biogenic mineralizationJ P Bradley
MVA Inc, Norcross, Georgia 30093, USA
Meteorit Planet Sci 33:765-73. 1998....
- Raman spectroscopic study of four Spanish shocked ordinary chondrites: Cañellas, Olmedilla de Alarcón, Reliegos and OlivenzaF Rull
Unidad Asociada UVA CSIC, Edificio INDITI, Parque Tecnologico de Boecillo, 47152 Boecillo, Valladolid, Spain
Philos Trans A Math Phys Eng Sci 368:3153-66. 2010..However, the full spectral band width of the silicate internal modes shows some dependence on the impact grade, which could be attributed to inhomogeneous effects produced by the impacts...
- Carbonates in fractures of Martian meteorite Allan Hills 84001: petrologic evidence for impact originE R Scott
Hawai i Institute of Geophysics and Planetology, University of Hawai i at Manoa, Honolulu 96822, USA
Meteorit Planet Sci 33:709-19. 1998..Carbonates in fractures, which include those studied by McKay et al. (1996), could not have formed at low temperatures and preserved mineralogical evidence for Martian organisms...
- Nanodiamonds do not provide unique evidence for a Younger Dryas impactH Tian
Electron Microscopy for Materials Science EMAT, Department of Physics, University of Antwerp, Groenenborgerlaan 171, B 2020 Antwerp, Belgium
Proc Natl Acad Sci U S A 108:40-4. 2011..The combination of these characteristics does not yield unique evidence for an exogenic impact related to the investigated layer...
- Biological potential of extraterrestrial materials. 2. Microbial and plant responses to nutrients in the Murchison carbonaceous meteoriteM N Mautner
Space Bioresources Laboratory, Department of Soil Science, Lincoln University, New Zealand
Icarus 129:245-53. 1997..The results also suggest that carbonaceous asteroid resources can sustain soil microbial activity and provide essential macronutrients for future space-based ecosystems...
- The delivery of organic matter from asteroids and comets to the early surface of MarsG J Flynn
Dept of Physics, SUNY Plattsburgh, NY 12901, USA
Earth Moon Planets 72:469-74. 1996..Interplanetary dust is shown to deliver an order-of-magnitude higher surface concentration of carbon onto Mars than onto Earth, suggesting interplanetary dust may be an important source of carbon on Mars as well...
- Carbonaceous materials in cometary environments: the case of the 3-4 micrometers bandsL Colangeli
Dipartimento di Ingegneria Industriale, University of Cassino, Italy
Adv Space Res 12:43-6. 1992..All these materials show significant features in the near IR region; however, only the synthetic spectra obtained from HAC grains show a satisfactory agreement with the profile of the cometary bands...
- Active methylotrophs in the sediments of Lonar Lake, a saline and alkaline ecosystem formed by meteor impactChakkiath Paul Antony
Microbial Culture Collection, National Centre for Cell Science, Pune, India
ISME J 4:1470-80. 2010..This study represents an essential first step towards understanding the relevance of methylotrophy in the soda lake sediments of an unusual impact crater structure...
- Interstellar chemistry recorded in organic matter from primitive meteoritesHenner Busemann
Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, USA
Science 312:727-30. 2006..Hence, both meteorites (originating from the asteroid belt) and interplanetary dust particles (possibly from comets) preserve primitive organics that were a component of the original building blocks of the solar system...
- Analyzing a comet nucleus by capillary GCRobert Sternberg
University of Paris 12 Vale de Marne, France
Anal Chem 74:481A-487A. 2002
- Incipient space weathering observed on the surface of Itokawa dust particlesT Noguchi
College of Science, Ibaraki University, 2 1 1 Bunkyo, Mito, Ibaraki 310 8512, Japan
Science 333:1121-5. 2011..Sulfur-free Fe-rich nanoparticles exist deeper inside (<60 nanometers) ferromagnesian silicates. Their texture suggests formation by metamictization and in situ reduction of Fe(2+)...
- Paleontology. Reversals reveal pitfalls in spotting ancient and E.T. lifeRichard A Kerr
Science 296:1384-5. 2002