Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Comet> ?p ?o }
- Comet abstract "A comet is an icy small Solar System body that, when passing close to the Sun, heats up and begins to outgas, displaying a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind upon the nucleus of the comet. Comet nuclei range from a few hundred metres to tens of kilometres across and are composed of loose collections of ice, dust, and small rocky particles. The coma and tail are much larger and, if sufficiently bright, may be seen from the Earth without the aid of a telescope. Comets have been observed and recorded since ancient times by many cultures.Comets have a wide range of orbital periods, ranging from several years to potentially several millions of years. Short-period comets originate in the Kuiper belt or its associated scattered disc, which lie beyond the orbit of Neptune. Long-period comets are thought to originate in the Oort cloud, a spherical cloud of icy bodies extending from outside the Kuiper belt to halfway to the next nearest star. Long-period comets are directed towards the Sun from the Oort cloud by gravitational perturbations caused by passing stars and the galactic tide. Hyperbolic comets may pass once through the inner Solar System before being flung out to interstellar space.Comets are distinguished from asteroids by the presence of an extended, gravitationally unbound atmosphere surrounding their central nucleus. This atmosphere has parts termed the coma (the central part immediately surrounding the nucleus) and the tail (a typically linear section consisting of dust or gas blown out from the coma by the Sun's light pressure or outstreaming solar wind plasma). However, extinct comets that have passed close to the Sun many times have lost nearly all of their volatile ices and dust and may come to resemble small asteroids. Asteroids are thought to have a different origin from comets, having formed inside the orbit of Jupiter rather than in the outer Solar System. The discovery of main-belt comets and active centaurs has blurred the distinction between asteroids and comets.As of November 2014 there are 5,253 known comets, a number that is steadily increasing. However, this represents only a tiny fraction of the total potential comet population, as the reservoir of comet-like bodies in the outer Solar System (in the Oort cloud) is estimated to be one trillion. Roughly one comet per year is visible to the naked eye, though many of these are faint and unspectacular. Particularly bright examples are called "Great Comets". Comets have been visited by unmanned probes such as the European Space Agency's Rosetta, which became the first ever to land a robotic spacecraft on a comet, and NASA's Deep Impact, which blasted a crater on Comet Tempel 1 to study its interior.".
- Comet thumbnail Deep_Impact_HRI.jpeg?width=300.
- Comet wikiPageExternalLink books?id=kC5oQgAACAAJ.
- Comet wikiPageExternalLink en.
- Comet wikiPageExternalLink solarsystem.nasa.gov.
- Comet wikiPageExternalLink profile.cfm?Object=Comets.
- Comet wikiPageExternalLink www.icq.eps.harvard.edu.
- Comet wikiPageExternalLink index.html.
- Comet wikiPageExternalLink nearearthobjectwatch.
- Comet wikiPageID "5962".
- Comet wikiPageLength "102037".
- Comet wikiPageOutDegree "409".
- Comet wikiPageRevisionID "683281273".
- Comet wikiPageWikiLink Hartley.
- Comet wikiPageWikiLink Tempel–Swift–LINEAR.
- Comet wikiPageWikiLink Shoemaker–Levy.
- Comet wikiPageWikiLink 14827_Hypnos.
- Comet wikiPageWikiLink NEAT.
- Comet wikiPageWikiLink Holmes.
- Comet wikiPageWikiLink Borrelly.
- Comet wikiPageWikiLink 2060_Chiron.
- Comet wikiPageWikiLink 2061:_Odyssey_Three.
- Comet wikiPageWikiLink PANSTARRS.
- Comet wikiPageWikiLink 3552_Don_Quixote.
- Comet wikiPageWikiLink Biela.
- Comet wikiPageWikiLink Neujmin.
- Comet wikiPageWikiLink Van_Biesbroeck.
- Comet wikiPageWikiLink 60558_Echeclus.
- Comet wikiPageWikiLink Churyumov–Gerasimenko.
- Comet wikiPageWikiLink Schwassmann–Wachmann.
- Comet wikiPageWikiLink Wild.
- Comet wikiPageWikiLink Machholz.
- Comet wikiPageWikiLink Tempel.
- Comet wikiPageWikiLink A-type_main-sequence_star.
- Comet wikiPageWikiLink A_V_star.
- Comet wikiPageWikiLink Absorption_spectroscopy.
- Comet wikiPageWikiLink Acetamide.
- Comet wikiPageWikiLink Acetone.
- Comet wikiPageWikiLink Adenine.
- Comet wikiPageWikiLink Albedo.
- Comet wikiPageWikiLink Alexis_Clairaut.
- Comet wikiPageWikiLink Amateur_astronomer.
- Comet wikiPageWikiLink Amateur_astronomy.
- Comet wikiPageWikiLink Amino_acid.
- Comet wikiPageWikiLink Ammonia.
- Comet wikiPageWikiLink Ancient_Greek.
- Comet wikiPageWikiLink Andromedids.
- Comet wikiPageWikiLink Antitail.
- Comet wikiPageWikiLink Aphelion.
- Comet wikiPageWikiLink Apoapsis.
- Comet wikiPageWikiLink Apsis.
- Comet wikiPageWikiLink Arietids.
- Comet wikiPageWikiLink Aristotle.
- Comet wikiPageWikiLink Armageddon_(1998_film).
- Comet wikiPageWikiLink Arthur_C._Clarke.
- Comet wikiPageWikiLink Asphalt.
- Comet wikiPageWikiLink Asteroid.
- Comet wikiPageWikiLink Asteroid_belt.
- Comet wikiPageWikiLink Asteroids.
- Comet wikiPageWikiLink Astronomical_symbols.
- Comet wikiPageWikiLink Astronomical_unit.
- Comet wikiPageWikiLink Atacama_Large_Millimeter_Array.
- Comet wikiPageWikiLink Australite.
- Comet wikiPageWikiLink Barycenter.
- Comet wikiPageWikiLink Barycentric_coordinates_(astronomy).
- Comet wikiPageWikiLink Beta_Pictoris.
- Comet wikiPageWikiLink Bielas_Comet.
- Comet wikiPageWikiLink Binoculars.
- Comet wikiPageWikiLink Black-body_radiation.
- Comet wikiPageWikiLink Black_body_radiation.
- Comet wikiPageWikiLink Bow_shock.
- Comet wikiPageWikiLink Bow_shocks_in_astrophysics.
- Comet wikiPageWikiLink 1861_J1.
- Comet wikiPageWikiLink 1956_R1.
- Comet wikiPageWikiLink 1980_E1.
- Comet wikiPageWikiLink 1999_F1.
- Comet wikiPageWikiLink 2000_U5.
- Comet wikiPageWikiLink 2001_Q4_(NEAT).
- Comet wikiPageWikiLink 2006_P1.
- Comet wikiPageWikiLink 2007_F1_(LONEOS).
- Comet wikiPageWikiLink 2009_R1.
- Comet wikiPageWikiLink 2011_L4.
- Comet wikiPageWikiLink 2011_W3_(Lovejoy).
- Comet wikiPageWikiLink 2012_F6_(Lemmon).
- Comet wikiPageWikiLink 2013_A1.
- Comet wikiPageWikiLink Carbon_dioxide.
- Comet wikiPageWikiLink Carbon_monoxide.
- Comet wikiPageWikiLink Cassini–Huygens.
- Comet wikiPageWikiLink Category:Articles_containing_video_clips.
- Comet wikiPageWikiLink Category:Astronomical_objects_known_since_antiquity.
- Comet wikiPageWikiLink Category:Comets.
- Comet wikiPageWikiLink Centaur_(minor_planet).
- Comet wikiPageWikiLink Ceres_(dwarf_planet).
- Comet wikiPageWikiLink Chemical_compound.
- Comet wikiPageWikiLink Coma_(cometary).
- Comet wikiPageWikiLink Comet.
- Comet wikiPageWikiLink Comet_Arend–Roland.
- Comet wikiPageWikiLink Comet_Encke.
- Comet wikiPageWikiLink Comet_Hale–Bopp.
- Comet wikiPageWikiLink Comet_Hartley_2.