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Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Observable_universe> ?p ?o }

• Observable_universe abstract "The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects have had time to reach Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic, the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth.The word observable used in this sense does not depend on whether modern technology actually permits detection of radiation from an object in this region (or indeed on whether there is any radiation to detect). It simply indicates that it is possible in principle for light or other signals from the object to reach an observer on Earth. In practice, we can see light only from as far back as the time of photon decoupling in the recombination epoch. That is when particles were first able to emit photons that were not quickly re-absorbed by other particles. Before then, the Universe was filled with a plasma that was opaque to photons. The detection of gravitational waves indicates there is now a possibility of detecting non-light signals from before the recombination epoch.The surface of last scattering is the collection of points in space at the exact distance that photons from the time of photon decoupling just reach us today. These are the photons we detect today as cosmic microwave background radiation (CMBR). However, with future technology, it may be possible to observe the still older relic neutrino background, or even more distant events via gravitational waves (which also should move at the speed of light). Sometimes astrophysicists distinguish between the visible universe, which includes only signals emitted since recombination – and the observable universe, which includes signals since the beginning of the cosmological expansion (the Big Bang in traditional cosmology, the end of the inflationary epoch in modern cosmology). According to calculations, the comoving distance (current proper distance) to particles from the CMBR, which represent the radius of the visible universe, is about 14.0 billion parsecs (about 45.7 billion light years), while the comoving distance to the edge of the observable universe is about 14.3 billion parsecs (about 46.6 billion light years), about 2% larger.The best estimate of the age of the universe as of 2015 is 7010137990000000000♠13.799±0.021 billion years but due to the expansion of space humans are observing objects that were originally much closer but are now considerably farther away (as defined in terms of cosmological proper distance, which is equal to the comoving distance at the present time) than a static 13.8 billion light-years distance. It is estimated that the diameter of the observable universe is about 28.5 gigaparsecs (93 billion light-years, 8.8×1026 metres or 5.5×1023 miles), putting the edge of the observable universe at about 46.5 billion light-years away.".
• Observable_universe thumbnail Observable_Universe_with_Measurements_01.png?width=300.
• Observable_universe wikiPageExternalLink ned.ipac.caltech.edu.
• Observable_universe wikiPageExternalLink universe.
• Observable_universe wikiPageExternalLink universe.html.
• Observable_universe wikiPageExternalLink apod.nasa.gov.
• Observable_universe wikiPageExternalLink ap071107.html.
• Observable_universe wikiPageExternalLink 1306.0091.
• Observable_universe wikiPageExternalLink 0305179.
• Observable_universe wikiPageExternalLink cosmography.
• Observable_universe wikiPageExternalLink index.html.
• Observable_universe wikiPageExternalLink Dltt_is_Dumb.html.
• Observable_universe wikiPageExternalLink cosmology_faq.html.
• Observable_universe wikiPageExternalLink size-of-the-universe.html.
• Observable_universe wikiPageExternalLink stars.survey.
• Observable_universe wikiPageExternalLink millennium.
• Observable_universe wikiPageExternalLink 2dFGRS.
• Observable_universe wikiPageExternalLink imagegallery.
• Observable_universe wikiPageExternalLink horizon.html.
• Observable_universe wikiPageExternalLink An.
• Observable_universe wikiPageExternalLink 070419125240.htm.
• Observable_universe wikiPageExternalLink watch?v=17jymDn0W6U.
• Observable_universe wikiPageExternalLink watch?v=K8V8Iy9Tozk.
• Observable_universe wikiPageID "251399".
• Observable_universe wikiPageLength "66205".
• Observable_universe wikiPageOutDegree "224".
• Observable_universe wikiPageRevisionID "708227992".
• Observable_universe wikiPageWikiLink 1,000,000,000.
• Observable_universe wikiPageWikiLink 2dF_Galaxy_Redshift_Survey.
• Observable_universe wikiPageWikiLink Abell_2218.
• Observable_universe wikiPageWikiLink Abundance_of_the_chemical_elements.
• Observable_universe wikiPageWikiLink Accelerating_expansion_of_the_universe.
• Observable_universe wikiPageWikiLink Age_of_the_universe.
• Observable_universe wikiPageWikiLink Alan_Guth.
• Observable_universe wikiPageWikiLink Asteroid.
• Observable_universe wikiPageWikiLink Astronomer.
• Observable_universe wikiPageWikiLink Astronomical_object.
• Observable_universe wikiPageWikiLink Astrophysics.
• Observable_universe wikiPageWikiLink Ball_(mathematics).
• Observable_universe wikiPageWikiLink Baryon.
• Observable_universe wikiPageWikiLink Big_Bang.
• Observable_universe wikiPageWikiLink Biochemistry.
• Observable_universe wikiPageWikiLink Bolshoi_Cosmological_Simulation.
• Observable_universe wikiPageWikiLink CMB_cold_spot.
• Observable_universe wikiPageWikiLink Category:Physical_cosmology.
• Observable_universe wikiPageWikiLink Category:Physical_universe.
• Observable_universe wikiPageWikiLink Causality_(physics).
• Observable_universe wikiPageWikiLink Centaurus.
• Observable_universe wikiPageWikiLink CfA2_Great_Wall.
• Observable_universe wikiPageWikiLink Chronology_of_the_universe.
• Observable_universe wikiPageWikiLink Clowes–Campusano_LQG.
• Observable_universe wikiPageWikiLink Cold_dark_matter.
• Observable_universe wikiPageWikiLink Comoving_distance.
• Observable_universe wikiPageWikiLink Constellation.
• Observable_universe wikiPageWikiLink Cosmic_microwave_background.
• Observable_universe wikiPageWikiLink Cosmic_neutrino_background.
• Observable_universe wikiPageWikiLink Cosmological_constant.
• Observable_universe wikiPageWikiLink Cosmological_principle.
• Observable_universe wikiPageWikiLink Dark_energy.
• Observable_universe wikiPageWikiLink Dark_flow.
• Observable_universe wikiPageWikiLink Dark_matter.
• Observable_universe wikiPageWikiLink Diameter.
• Observable_universe wikiPageWikiLink Discover_(magazine).
• Observable_universe wikiPageWikiLink Distance_measures_(cosmology).
• Observable_universe wikiPageWikiLink EQ_J221734.0+001701.
• Observable_universe wikiPageWikiLink Earth.
• Observable_universe wikiPageWikiLink Edward_L._Wright.
• Observable_universe wikiPageWikiLink Electromagnetic_radiation.
• Observable_universe wikiPageWikiLink Eridanus_(constellation).
• Observable_universe wikiPageWikiLink Euclidean_space.
• Observable_universe wikiPageWikiLink Event_horizon.
• Observable_universe wikiPageWikiLink Extraterrestrial_life.
• Observable_universe wikiPageWikiLink Fractal.
• Observable_universe wikiPageWikiLink Fred_Hoyle.
• Observable_universe wikiPageWikiLink Friedmann_equations.
• Observable_universe wikiPageWikiLink Friedmann–Lemaître–Robertson–Walker_metric.
• Observable_universe wikiPageWikiLink GRB_090423.
• Observable_universe wikiPageWikiLink Galaxy.
• Observable_universe wikiPageWikiLink Galaxy_cluster.
• Observable_universe wikiPageWikiLink Galaxy_filament.
• Observable_universe wikiPageWikiLink Galaxy_group.
• Observable_universe wikiPageWikiLink Gamma-ray_burst.
• Observable_universe wikiPageWikiLink General_relativity.
• Observable_universe wikiPageWikiLink Giant_Void.
• Observable_universe wikiPageWikiLink Gravitational_constant.
• Observable_universe wikiPageWikiLink Gravitational_lens.
• Observable_universe wikiPageWikiLink Gravitational_wave.
• Observable_universe wikiPageWikiLink Gravitational_wave_background.
• Observable_universe wikiPageWikiLink Great_Attractor.
• Observable_universe wikiPageWikiLink Hercules-Corona_Borealis_Great_Wall.
• Observable_universe wikiPageWikiLink Hierarchy.
• Observable_universe wikiPageWikiLink Hubble_Space_Telescope.
• Observable_universe wikiPageWikiLink Hubble_Ultra-Deep_Field.
• Observable_universe wikiPageWikiLink Hubble_eXtreme_Deep_Field.
• Observable_universe wikiPageWikiLink Hubble_volume.
• Observable_universe wikiPageWikiLink Hubbles_law.
• Observable_universe wikiPageWikiLink Huge-LQG.
• Observable_universe wikiPageWikiLink Hydra-Centaurus_Supercluster.
• Observable_universe wikiPageWikiLink Hydra_(constellation).
• Observable_universe wikiPageWikiLink Hydrogen.

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