Summary: Celestial bodies orbiting around the sun or other stars.

Top Publications

  1. Catling D, Glein C, Zahnle K, McKay C. Why O2 is required by complex life on habitable planets and the concept of planetary "oxygenation time". Astrobiology. 2005;5:415-38 pubmed
    ..the oxygenation time is likely to be a key rate-limiting step in the evolution of complex life on other habitable planets. The oxygenation time could preclude complex life on Earth-like planets orbiting short-lived stars that end their ..
  2. Vance S, Harnmeijer J, Kimura J, Hussmann H, Demartin B, Brown J. Hydrothermal systems in small ocean planets. Astrobiology. 2007;7:987-1005 pubmed publisher
    We examine means for driving hydrothermal activity in extraterrestrial oceans on planets and satellites of less than one Earth mass, with implications for sustaining a low level of biological activity over geological timescales...
  3. Brack A, Horneck G, Cockell C, Berces A, Belisheva N, Eiroa C, et al. Origin and evolution of life on terrestrial planets. Astrobiology. 2010;10:69-76 pubmed publisher
    ..on Earth must be studied if we hope to understand the principles of how life might evolve on other terrestrial planets in the Universe...
  4. Santos N, Benz W, Mayor M. Extrasolar planets: constraints for planet formation models. Science. 2005;310:251-5 pubmed
    Since 1995, more than 150 extrasolar planets have been discovered, most of them in orbits quite different from those of the giant planets in our own solar system...
  5. Holm N, Andersson E. Hydrothermal simulation experiments as a tool for studies of the origin of life on Earth and other terrestrial planets: a review. Astrobiology. 2005;5:444-60 pubmed
    ..We also discuss some of the theoretical and practical considerations that apply to hydrothermal laboratory studies of organic molecules related to the origin of life on Earth and probably also to the other terrestrial planets.
  6. Knacke R. Possibilities for the detection of microbial life on extrasolar planets. Astrobiology. 2003;3:531-41 pubmed
    We consider possibilities for the remote detection of microbial life on extrasolar planets. The Darwin/Terrestrial Planet Finder (TPF) telescope concepts for observations of terrestrial planets focus on indirect searches for life through ..
  7. Nicholson W, Setlow B, Setlow P. UV photochemistry of DNA in vitro and in Bacillus subtilis spores at earth-ambient and low atmospheric pressure: implications for spore survival on other planets or moons in the solar system. Astrobiology. 2002;2:417-25 pubmed
  8. Guillot T. Interiors of giant planets inside and outside the solar system. Science. 1999;286:72-7 pubmed
    An understanding of the structure and composition of the giant planets is rapidly evolving because of (i) high-pressure experiments with the ability to study metallic hydrogen and define the properties of its equation of state and (ii) ..
  9. Lammer H, Selsis F, Chassefière E, Breuer D, Griessmeier J, Kulikov Y, et al. Geophysical and atmospheric evolution of habitable planets. Astrobiology. 2010;10:45-68 pubmed publisher
    The evolution of Earth-like habitable planets is a complex process that depends on the geodynamical and geophysical environments. In particular, it is necessary that plate tectonics remain active over billions of years...

More Information


  1. Domagal Goldman S, Meadows V, Claire M, Kasting J. Using biogenic sulfur gases as remotely detectable biosignatures on anoxic planets. Astrobiology. 2011;11:419-41 pubmed publisher
    ..Thus, a characterization mission could detect these organic sulfur gases-and therefore the life that produces them-if it could sufficiently quantify the ethane and methane in the exoplanet's atmosphere. ..
  2. Wan L, Ogrinz B, Vigo D, Bersenev E, Tuerlinckx F, Van den Bergh O, et al. Cardiovascular autonomic adaptation to long-term confinement during a 105-day simulated Mars mission. Aviat Space Environ Med. 2011;82:711-6 pubmed
    ..Our findings are in line with and extend previous findings on the alteration of blood pressure regulation due to long-term confinement. ..
  3. Sammonds P. Planetary science. Creep and flow on the icy moons of the outer planets. Science. 2006;311:1250-1 pubmed
  4. Segura A, Kasting J, Meadows V, Cohen M, Scalo J, Crisp D, et al. Biosignatures from Earth-like planets around M dwarfs. Astrobiology. 2005;5:706-25 pubmed
    Coupled one-dimensional photochemical-climate calculations have been performed for hypothetical Earth-like planets around M dwarfs...
  5. Harnett B, Doarn C, Russell K, Kapoor V, Merriam N, Merrell R. Wireless telemetry and Internet technologies for medical management: a Martian analogy. Aviat Space Environ Med. 2001;72:1125-31 pubmed will be an important component for both low-Earth orbiting spacecraft and long-term missions to distant planets. However, terrestrial applications represent the primary application of such technologies because the home can be ..
  6. Gaidos E, Deschenes B, Dundon L, Fagan K, Menviel Hessler L, Moskovitz N, et al. Beyond the principle of plentitude: a review of terrestrial planet habitability. Astrobiology. 2005;5:100-26 pubmed
    We review recent work that directly or indirectly addresses the habitability of terrestrial (rocky) planets like the Earth...
  7. Luspay Kuti A, Mousis O, Hässig M, Fuselier S, Lunine J, Marty B, et al. The presence of clathrates in comet 67P/Churyumov-Gerasimenko. Sci Adv. 2016;2:e1501781 pubmed publisher
  8. Kaltenegger L, Selsis F, Fridlund M, Lammer H, Beichman C, Danchi W, et al. Deciphering spectral fingerprints of habitable exoplanets. Astrobiology. 2010;10:89-102 pubmed publisher
    ..exoplanet detections, observation techniques have advanced to a level where we now have the capability to find planets of less than 10 Earth masses (M(Earth)) (so-called "super Earths"), which may be habitable...
  9. Joshi M. Climate model studies of synchronously rotating planets. Astrobiology. 2003;3:415-27 pubmed
    ..sequence stars though, until recently, their star systems have not been considered suitable places for habitable planets to exist...
  10. Alibert Y, Broeg C, Benz W, Wuchterl G, Grasset O, Sotin C, et al. Origin and formation of planetary systems. Astrobiology. 2010;10:19-32 pubmed publisher
    ..finding them, it is crucial to understand the formation of planetary systems in general and that of terrestrial planets in particular...
  11. Kerr R. Planetary science. NASA's new road to faster, cheaper, better exploration. Science. 2002;298:1320-2 pubmed
  12. Mayer L, Quinn T, Wadsley J, Stadel J. Formation of giant planets by fragmentation of protoplanetary disks. Science. 2002;298:1756-9 pubmed
    ..The resulting bodies have masses and orbital eccentricities similar to those of detected extrasolar planets.
  13. Worth R, Sigurdsson S, House C. Seeding life on the moons of the outer planets via lithopanspermia. Astrobiology. 2013;13:1155-65 pubmed publisher
    ..We found that, in addition to frequent transfer of material among the terrestrial planets, transfer of material from Earth and Mars to the moons of Jupiter and Saturn is also possible, but rare...
  14. Hegde S, Kaltenegger L. Colors of extreme exo-Earth environments. Astrobiology. 2013;13:47-56 pubmed publisher
    The search for extrasolar planets has already detected rocky planets and several planetary candidates with minimum masses that are consistent with rocky planets in the habitable zone of their host stars...
  15. Sen S, Widgeon S, Navrotsky A, Mera G, Tavakoli A, Ionescu E, et al. Carbon substitution for oxygen in silicates in planetary interiors. Proc Natl Acad Sci U S A. 2013;110:15904-7 pubmed publisher
  16. Forsberg A, Prabhat -, Haley G, Bragdon A, Levy J, Fassett C, et al. Adviser: immersive field work for planetary geoscientists. IEEE Comput Graph Appl. 2006;26:46-54 pubmed
  17. Des Marais D, Harwit M, Jucks K, Kasting J, Lin D, Lunine J, et al. Remote sensing of planetary properties and biosignatures on extrasolar terrestrial planets. Astrobiology. 2002;2:153-81 pubmed
    ..Planet Finder (TPF) and the European Space Agency's Darwin missions are to detect terrestrial-sized extrasolar planets directly and to seek spectroscopic evidence of habitable conditions and life...
  18. Dittmann J, Irwin J, Charbonneau D, Bonfils X, Astudillo Defru N, Haywood R, et al. A temperate rocky super-Earth transiting a nearby cool star. Nature. 2017;544:333-336 pubmed publisher
    ..The atmospheres of orbiting Earth-sized planets are observationally accessible via transmission spectroscopy when the planets pass in front of these stars...
  19. Levison H, Duncan M, Brasser R, Kaufmann D. Capture of the Sun's Oort cloud from stars in its birth cluster. Science. 2010;329:187-90 pubmed publisher
    ..have formed in the Sun's protoplanetary disk and to have been ejected to large heliocentric orbits by the giant planets. Detailed models of this process fail to reproduce all of the available observational constraints, however...
  20. Wang M, Jiang Y, Kim K, Qu G, Ji H, Mittenthal J, et al. A universal molecular clock of protein folds and its power in tracing the early history of aerobic metabolism and planet oxygenation. Mol Biol Evol. 2011;28:567-82 pubmed publisher
    ..The clock also extends the standard concept that was specific to molecules and their timescales and turns it into a universal timescale-generating tool. ..
  21. Reinhard C, Olson S, Schwieterman E, Lyons T. False Negatives for Remote Life Detection on Ocean-Bearing Planets: Lessons from the Early Earth. Astrobiology. 2017;17:287-297 pubmed publisher
    ..will often render surface biospheres on ocean-bearing silicate worlds cryptic, with the implication that the planets most conducive to the development and maintenance of a pervasive biosphere will often be challenging to ..
  22. Rushby A, Claire M, Osborn H, Watson A. Habitable zone lifetimes of exoplanets around main sequence stars. Astrobiology. 2013;13:833-49 pubmed publisher the increase in luminosity of a star undergoing stellar evolution, possibly including or excluding planets over the course of the star's main sequence lifetime...
  23. Kislyakova K, Lammer H, Holmstrom M, Panchenko M, Odert P, Erkaev N, et al. XUV-exposed, non-hydrostatic hydrogen-rich upper atmospheres of terrestrial planets. Part II: hydrogen coronae and ion escape. Astrobiology. 2013;13:1030-48 pubmed publisher
    ..that of the present-day Sun were considered, and the formation of high-energy neutral hydrogen clouds around the planets due to the charge-exchange reaction under various stellar conditions was modeled...
  24. Dobrijevic M, Parisot J, Dutour I. A study of chemical systems using signal flow graph theory. Adv Space Res. 1995;16:105-8 pubmed
    Photochemistry of giant planets and their satellites is characterized by numerous reactions involving a lot of chemical species. In the present paper, chemical systems are modeled by signal flow graphs...
  25. Schilling G. Exoplanets. Habitable, but not much like home. Science. 2007;316:528 pubmed
  26. Kiang N, Siefert J, Govindjee -, Blankenship R. Spectral signatures of photosynthesis. I. Review of Earth organisms. Astrobiology. 2007;7:222-51 pubmed
    ..That plants absorb less green light may not be an inefficient legacy of evolutionary history, but may actually satisfy the above criteria. ..
  27. von Bloh W, Franck S, Bounama C, Schellnhuber H. Maximum number of habitable planets at the time of Earth's origin: new hints for panspermia?. Orig Life Evol Biosph. 2003;33:219-31 pubmed
    ..for the probability of interstellar panspermia is the average density of stellar systems containing habitable planets. The combination of recent results for the formation rate of Earth-like planets with our estimations of ..
  28. Shapiro R, Schulze Makuch D. The search for alien life in our solar system: strategies and priorities. Astrobiology. 2009;9:335-43 pubmed publisher
    ..Europa appears to contain a subsurface ocean with the possibility of hydrothermal vents as an energy source. Its inventory of organic carbon is not yet known. ..
  29. Whitmire D, Doyle L, Reynolds R, Matese J. A slightly more massive young Sun as an explanation for warm temperatures on early Mars. J Geophys Res. 1995;100:5457-64 pubmed
    ..2(-0.2, +0.4) Gyr of the Sun's main sequence phase. The implied mass-loss rate of 4(+3, -2) x 10(-11) M solar yr-1, or about 10(3)x that of the current Sun, may be detectable in several nearby young solar type stars. ..
  30. Suo Z, Avci R, Schweitzer M, Deliorman M. Porphyrin as an ideal biomarker in the search for extraterrestrial life. Astrobiology. 2007;7:605-15 pubmed
    ..We present preliminary data to support the use of ToFSIMS as a powerful technique in the identification of porphyrins. ..
  31. Tinetti G, Vidal Madjar A, Liang M, Beaulieu J, Yung Y, Carey S, et al. Water vapour in the atmosphere of a transiting extrasolar planet. Nature. 2007;448:169-71 pubmed
    ..if not the most abundant) molecular species after hydrogen in the atmospheres of close-in extrasolar giant planets ('hot Jupiters')...
  32. Ryder G. Bombardment of the Hadean Earth: wholesome or deleterious?. Astrobiology. 2003;3:3-6 pubmed
    ..and was just beginning to publish on correlations of the early lunar impact record to that of the other inner planets at the time of his death. Graham's abstract to the Rubey Colloquium was never presented...
  33. Fridlund M, Eiroa C, Henning T, Herbst T, Kaltenegger L, Leger A, et al. A roadmap for the detection and characterization of other Earths. Astrobiology. 2010;10:113-9 pubmed publisher" This main theme is addressed through further questions: 1) How do gas and dust give rise to stars and planets? 2) How will the search for and study of exoplanets eventually lead to the detection of life outside Earth (..
  34. Rividi N, Van Zuilen M, Philippot P, Ménez B, Godard G, Poidatz E. Calibration of carbonate composition using micro-Raman analysis: application to planetary surface exploration. Astrobiology. 2010;10:293-309 pubmed publisher
    ..These results indicate that Raman spectroscopy can provide direct information on the composition and structure of carbonates on planetary surfaces. ..
  35. Magnor M, Kindlmann G, Hansen C, Duric N. Reconstruction and visualization of planetary nebulae. IEEE Trans Vis Comput Graph. 2005;11:485-96 pubmed
    ..In addition, the recovered spatial distribution of the emissive gas can help astrophysicists gain deeper insight into the formation processes of planetary nebulae. ..
  36. Tennyson J, Miller S. Spectroscopy of H3+ and its impact on astrophysics. Spectrochim Acta A Mol Biomol Spectrosc. 2001;57:661-7 pubmed
    ..Successful detection of H3+ in gas-giant planets, supernova ejecta and the interstellar medium as well as the prospects for future observations are discussed...
  37. Owen T. Time travel and chemical evolution: a look at the outer solar system. Planet Rep. 1987;7:16-8 pubmed
    Many space scientists think that the chemical conditions today on planets and moons of the outer solar system are similar to conditions on Earth soon after it formed...
  38. Haqq Misra J. An ecological compass for planetary engineering. Astrobiology. 2012;12:985-97 pubmed publisher
    ..We apply this analysis to the realm of planetary engineering, such as terraforming on Mars or geoengineering on present-day Earth, as well as to questions of planetary protection and space exploration. ..
  39. Tombu M, Seiffert A. Tracking planets and moons: mechanisms of object tracking revealed with a new paradigm. Atten Percept Psychophys. 2011;73:738-50 pubmed publisher
    ..These observations support models of object tracking that include information about object motion and reject models that use location alone. ..
  40. Jamieson B, Lynch B, Harpold D, Niemann H, Shappirio M, Mahaffy P. Microfabricated silicon leak for sampling planetary atmospheres with a mass spectrometer. Rev Sci Instrum. 2007;78:065109 pubmed
    ..The integration of an inlet heater into the leak device has also been demonstrated in this work. ..
  41. Moskovitz N, Gaidos E, Williams D. The effect of lunarlike satellites on the orbital infrared light curves of Earth-analog planets. Astrobiology. 2009;9:269-77 pubmed publisher
    ..the influence of lunarlike satellites on the infrared orbital light curves of Earth-analog extrasolar planets. Such light curves will be obtained by NASA's Terrestrial Planet Finder (TPF) and ESA's Darwin missions as a ..
  42. Battistelli E, Falciani P, Magnani P, Midollini B, Preti G, Re E. Galileo Avionica's technologies and instruments for planetary exploration. Orig Life Evol Biosph. 2006;36:587-96 pubmed
    ..Main technologies and specifications are outlined; for more detailed information please refer to Galileo Avionica's web-site at: . ..
  43. Tinetti G, Meadows V, Crisp D, Fong W, Fishbein E, Turnbull M, et al. Detectability of planetary characteristics in disk-averaged spectra. I: The Earth model. Astrobiology. 2006;6:34-47 pubmed
    ..2 decades, NASA and ESA are planning a series of space-based observatories to detect and characterize extrasolar planets. This first generation of observatories will not be able to spatially resolve the terrestrial planets detected...
  44. Dartnell L. Ionizing radiation and life. Astrobiology. 2011;11:551-82 pubmed publisher
    ..This review highlights the common thread that ionizing radiation forms between the disparate component disciplines of astrobiology. ..
  45. Baquero F. Predictions: evolutionary trajectories and planet medicine. Microb Biotechnol. 2009;2:130-2 pubmed publisher
  46. Sala S, Goralczyk M. Chemical footprint: a methodological framework for bridging life cycle assessment and planetary boundaries for chemical pollution. Integr Environ Assess Manag. 2013;9:623-32 pubmed publisher
  47. Bethell T, Bergin E. Formation and survival of water vapor in the terrestrial planet-forming region. Science. 2009;326:1675-7 pubmed publisher
    ..The total abundance of water vapor in the natal habitable zone is equal to that of several thousand oceans. ..
  48. Szuszkiewicz E, Podlewska Gaca E. Migration-induced architectures of planetary systems. Orig Life Evol Biosph. 2012;42:113-42 pubmed publisher
    ..At the early stages of the evolution, when planets are still embedded in a gaseous disc, the tidal interactions between the disc and planets cause the planetary ..
  49. Alexander C, Bowden R, Fogel M, Howard K, Herd C, Nittler L. The provenances of asteroids, and their contributions to the volatile inventories of the terrestrial planets. Science. 2012;337:721-3 pubmed publisher
    ..The bulk hydrogen and nitrogen isotopic compositions of CI chondrites suggest that they were the principal source of Earth's volatiles. ..
  50. Levasseur Regourd A, Lasue J, Desvoivres E. Early inner solar system impactors: physical properties of comet nuclei and dust particles revisited. Orig Life Evol Biosph. 2006;36:507-14 pubmed
    During the epoch of early bombardment, terrestrial planets have been heavily impacted by cometary nuclei and cometary dust particles progressively injected in the interplanetary medium...
  51. Lawler A. Solar system exploration. Planetary science's defining moment. Science. 2002;295:32-7 pubmed
  52. Lapshin R. Availability of feature-oriented scanning probe microscopy for remote-controlled measurements on board a space laboratory or planet exploration Rover. Astrobiology. 2009;9:437-42 pubmed publisher
    ..A number of topical problems of SPM measurements in outer space or on board a planet exploration rover may be solved via the application of recently proposed FOS methods. ..
  53. Seshadri S, Chin K, Buehler M, Anderson R. Using electrical impedance spectroscopy to detect water in planetary regoliths. Astrobiology. 2008;8:781-92 pubmed publisher
    ..A "universal" curve between conductivity and water content establishes detectability limits of <0.01 wt% and approximately 0.3 wt% for water/sand mixtures containing liquid water and ice, respectively. ..