Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Planetary_habitability> ?p ?o }
- Planetary_habitability abstract "Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as \"extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.\"In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.".
- Planetary_habitability thumbnail The_Earth_seen_from_Apollo_17.jpg?width=300.
- Planetary_habitability wikiPageExternalLink habitable-exoplanets-catalog.
- Planetary_habitability wikiPageExternalLink ETEmain.html.
- Planetary_habitability wikiPageExternalLink phl.upr.edu.
- Planetary_habitability wikiPageExternalLink www.astrobio.net.
- Planetary_habitability wikiPageExternalLink www.hzgallery.org.
- Planetary_habitability wikiPageExternalLink www.planetarysci.com.
- Planetary_habitability wikiPageExternalLink R414.
- Planetary_habitability wikiPageExternalLink www.solstation.com.
- Planetary_habitability wikiPageID "2592906".
- Planetary_habitability wikiPageLength "89669".
- Planetary_habitability wikiPageOutDegree "342".
- Planetary_habitability wikiPageRevisionID "702798437".
- Planetary_habitability wikiPageWikiLink 16_Cygni.
- Planetary_habitability wikiPageWikiLink 18_Scorpii.
- Planetary_habitability wikiPageWikiLink 47_Ursae_Majoris.
- Planetary_habitability wikiPageWikiLink Abiogenesis.
- Planetary_habitability wikiPageWikiLink Acidophile.
- Planetary_habitability wikiPageWikiLink Aeolian_processes.
- Planetary_habitability wikiPageWikiLink Age_of_the_universe.
- Planetary_habitability wikiPageWikiLink Alan_Boss.
- Planetary_habitability wikiPageWikiLink Alien_Planet.
- Planetary_habitability wikiPageWikiLink Alkaliphile.
- Planetary_habitability wikiPageWikiLink Alpha_Centauri.
- Planetary_habitability wikiPageWikiLink Ames_Research_Center.
- Planetary_habitability wikiPageWikiLink Amino_acid.
- Planetary_habitability wikiPageWikiLink Ammonia.
- Planetary_habitability wikiPageWikiLink Anaerobic_organism.
- Planetary_habitability wikiPageWikiLink Archaea.
- Planetary_habitability wikiPageWikiLink Asteroid.
- Planetary_habitability wikiPageWikiLink Asteroid_belt.
- Planetary_habitability wikiPageWikiLink Astrobiology.
- Planetary_habitability wikiPageWikiLink Astronomical_unit.
- Planetary_habitability wikiPageWikiLink Astrophysics.
- Planetary_habitability wikiPageWikiLink Atacama_Desert.
- Planetary_habitability wikiPageWikiLink Atmosphere.
- Planetary_habitability wikiPageWikiLink Atmosphere_of_Earth.
- Planetary_habitability wikiPageWikiLink Atmospheric_pressure.
- Planetary_habitability wikiPageWikiLink Axial_tilt.
- Planetary_habitability wikiPageWikiLink Bacteria.
- Planetary_habitability wikiPageWikiLink Bar_(unit).
- Planetary_habitability wikiPageWikiLink Big_Bang.
- Planetary_habitability wikiPageWikiLink Binary_star.
- Planetary_habitability wikiPageWikiLink Biochemistry.
- Planetary_habitability wikiPageWikiLink Biodiversity.
- Planetary_habitability wikiPageWikiLink Biologist.
- Planetary_habitability wikiPageWikiLink Biomass.
- Planetary_habitability wikiPageWikiLink Biosignature.
- Planetary_habitability wikiPageWikiLink Biosphere.
- Planetary_habitability wikiPageWikiLink Boiling_point.
- Planetary_habitability wikiPageWikiLink Brown_dwarf.
- Planetary_habitability wikiPageWikiLink CNO_cycle.
- Planetary_habitability wikiPageWikiLink Carbon.
- Planetary_habitability wikiPageWikiLink Carbon-based_life.
- Planetary_habitability wikiPageWikiLink Carbon_dioxide.
- Planetary_habitability wikiPageWikiLink Carbon_monoxide.
- Planetary_habitability wikiPageWikiLink Carl_Sagan.
- Planetary_habitability wikiPageWikiLink Carnegie_Institution_for_Science.
- Planetary_habitability wikiPageWikiLink Catalog_of_Nearby_Habitable_Systems.
- Planetary_habitability wikiPageWikiLink Category:Astrobiology.
- Planetary_habitability wikiPageWikiLink Category:Exoplanetology.
- Planetary_habitability wikiPageWikiLink Category:Planetary_habitability.
- Planetary_habitability wikiPageWikiLink Category:Space_colonization.
- Planetary_habitability wikiPageWikiLink Cell_(biology).
- Planetary_habitability wikiPageWikiLink Centauri_B.
- Planetary_habitability wikiPageWikiLink Charles_S._Cockell.
- Planetary_habitability wikiPageWikiLink Chemosynthesis.
- Planetary_habitability wikiPageWikiLink Circumstellar_habitable_zone.
- Planetary_habitability wikiPageWikiLink Class_M_planet.
- Planetary_habitability wikiPageWikiLink Comet.
- Planetary_habitability wikiPageWikiLink Comet_Shoemaker–Levy_9.
- Planetary_habitability wikiPageWikiLink Cosmic_ray.
- Planetary_habitability wikiPageWikiLink Covalent_bond.
- Planetary_habitability wikiPageWikiLink Crust_(geology).
- Planetary_habitability wikiPageWikiLink Cyanobacteria.
- Planetary_habitability wikiPageWikiLink DNA.
- Planetary_habitability wikiPageWikiLink Darwin_(spacecraft).
- Planetary_habitability wikiPageWikiLink David_Grinspoon.
- Planetary_habitability wikiPageWikiLink Definition_of_planet.
- Planetary_habitability wikiPageWikiLink Diameter.
- Planetary_habitability wikiPageWikiLink Dirk_Schulze-Makuch.
- Planetary_habitability wikiPageWikiLink Dynamo.
- Planetary_habitability wikiPageWikiLink Earth.
- Planetary_habitability wikiPageWikiLink Earth_analog.
- Planetary_habitability wikiPageWikiLink Earthquake.
- Planetary_habitability wikiPageWikiLink Earths_magnetic_field.
- Planetary_habitability wikiPageWikiLink Ecliptic.
- Planetary_habitability wikiPageWikiLink Energy.
- Planetary_habitability wikiPageWikiLink Escape_velocity.
- Planetary_habitability wikiPageWikiLink Europa_(moon).
- Planetary_habitability wikiPageWikiLink European_Space_Agency.
- Planetary_habitability wikiPageWikiLink Evolving_the_Alien.
- Planetary_habitability wikiPageWikiLink Exoplanet.
- Planetary_habitability wikiPageWikiLink Extrapolation.
- Planetary_habitability wikiPageWikiLink Extraterrestrial_life.
- Planetary_habitability wikiPageWikiLink Extraterrestrial_liquid_water.
- Planetary_habitability wikiPageWikiLink Extremophile.
- Planetary_habitability wikiPageWikiLink Feedback.
- Planetary_habitability wikiPageWikiLink File:The_Earth_seen_from_Apollo_17.jpg.