Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Stellar_evolution> ?p ?o }
- Stellar_evolution abstract "Stellar evolution is the process by which a star changes during its lifetime. Depending on the mass of the star, this lifetime ranges from a few million years for the most massive to trillions of years for the least massive, which is considerably longer than the age of the universe. The table shows the lifetimes of stars as a function of their masses. All stars are born from collapsing clouds of gas and dust, often called nebulae or molecular clouds. Over the course of millions of years, these protostars settle down into a state of equilibrium, becoming what is known as a main-sequence star.Nuclear fusion powers a star for most of its life. Initially the energy is generated by the fusion of hydrogen atoms at the core of the main-sequence star. Later, as the preponderance of atoms at the core becomes helium, stars like the Sun begin to fuse hydrogen along a spherical shell surrounding the core. This process causes the star to gradually grow in size, passing through the subgiant stage until it reaches the red giant phase. Stars with at least half the mass of the Sun can also begin to generate energy through the fusion of helium at their core, whereas more-massive stars can fuse heavier elements along a series of concentric shells. Once a star like the Sun has exhausted its nuclear fuel, its core collapses into a dense white dwarf and the outer layers are expelled as a planetary nebula. Stars with around ten or more times the mass of the Sun can explode in a supernova as their inert iron cores collapse into an extremely dense neutron star or black hole. Although the universe is not old enough for any of the smallest red dwarfs to have reached the end of their lives, stellar models suggest they will slowly become brighter and hotter before running out of hydrogen fuel and becoming low-mass white dwarfs.Stellar evolution is not studied by observing the life of a single star, as most stellar changes occur too slowly to be detected, even over many centuries. Instead, astrophysicists come to understand how stars evolve by observing numerous stars at various points in their lifetime, and by simulating stellar structure using computer models.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.".
- Stellar_evolution thumbnail Representative_lifetimes_of_stars_as_a_function_of_their_masses.svg?width=300.
- Stellar_evolution wikiPageExternalLink astr606.
- Stellar_evolution wikiPageExternalLink stellar-models.
- Stellar_evolution wikiPageExternalLink evol_hr.swf.
- Stellar_evolution wikiPageExternalLink Unit2.
- Stellar_evolution wikiPageID "27980".
- Stellar_evolution wikiPageLength "46835".
- Stellar_evolution wikiPageOutDegree "211".
- Stellar_evolution wikiPageRevisionID "701042660".
- Stellar_evolution wikiPageWikiLink Accretion_(astrophysics).
- Stellar_evolution wikiPageWikiLink Age_of_the_universe.
- Stellar_evolution wikiPageWikiLink Aldebaran.
- Stellar_evolution wikiPageWikiLink Alpha_process.
- Stellar_evolution wikiPageWikiLink Angular_momentum.
- Stellar_evolution wikiPageWikiLink Arcturus.
- Stellar_evolution wikiPageWikiLink Astrophysical_maser.
- Stellar_evolution wikiPageWikiLink Astrophysics.
- Stellar_evolution wikiPageWikiLink Asymptotic_giant_branch.
- Stellar_evolution wikiPageWikiLink Binary_system.
- Stellar_evolution wikiPageWikiLink Black_dwarf.
- Stellar_evolution wikiPageWikiLink Black_hole.
- Stellar_evolution wikiPageWikiLink Blue_supergiant.
- Stellar_evolution wikiPageWikiLink Boötes.
- Stellar_evolution wikiPageWikiLink Brown_dwarf.
- Stellar_evolution wikiPageWikiLink CNO_cycle.
- Stellar_evolution wikiPageWikiLink Carbon.
- Stellar_evolution wikiPageWikiLink Carbon-burning_process.
- Stellar_evolution wikiPageWikiLink Carbon_star.
- Stellar_evolution wikiPageWikiLink Category:Articles_containing_video_clips.
- Stellar_evolution wikiPageWikiLink Category:Stellar_astronomy.
- Stellar_evolution wikiPageWikiLink Category:Stellar_evolution.
- Stellar_evolution wikiPageWikiLink Centrifugal_force.
- Stellar_evolution wikiPageWikiLink Chandrasekhar_limit.
- Stellar_evolution wikiPageWikiLink Chemical_element.
- Stellar_evolution wikiPageWikiLink Circumstellar_dust.
- Stellar_evolution wikiPageWikiLink Circumstellar_envelope.
- Stellar_evolution wikiPageWikiLink Computer_simulation.
- Stellar_evolution wikiPageWikiLink Convection.
- Stellar_evolution wikiPageWikiLink Cosmos_Redshift_7.
- Stellar_evolution wikiPageWikiLink Degenerate_matter.
- Stellar_evolution wikiPageWikiLink Deuterium_burning.
- Stellar_evolution wikiPageWikiLink Effective_temperature.
- Stellar_evolution wikiPageWikiLink Electron.
- Stellar_evolution wikiPageWikiLink Electron_capture.
- Stellar_evolution wikiPageWikiLink Electron_degeneracy_pressure.
- Stellar_evolution wikiPageWikiLink Energy.
- Stellar_evolution wikiPageWikiLink Escape_velocity.
- Stellar_evolution wikiPageWikiLink File:Crab_Nebula.jpg.
- Stellar_evolution wikiPageWikiLink G-type_main-sequence_star.
- Stellar_evolution wikiPageWikiLink Galaxy.
- Stellar_evolution wikiPageWikiLink Galaxy_formation_and_evolution.
- Stellar_evolution wikiPageWikiLink General_relativity.
- Stellar_evolution wikiPageWikiLink Gravitational_binding_energy.
- Stellar_evolution wikiPageWikiLink Gravitational_collapse.
- Stellar_evolution wikiPageWikiLink Gravitational_energy.
- Stellar_evolution wikiPageWikiLink Gravity.
- Stellar_evolution wikiPageWikiLink Helium.
- Stellar_evolution wikiPageWikiLink Helium_flash.
- Stellar_evolution wikiPageWikiLink Hertzsprung–Russell_diagram.
- Stellar_evolution wikiPageWikiLink Horizontal_branch.
- Stellar_evolution wikiPageWikiLink Hydrogen.
- Stellar_evolution wikiPageWikiLink Hydrogen_atom.
- Stellar_evolution wikiPageWikiLink Hydrostatic_equilibrium.
- Stellar_evolution wikiPageWikiLink Infrared.
- Stellar_evolution wikiPageWikiLink Instability_strip.
- Stellar_evolution wikiPageWikiLink International_Astronomical_Union.
- Stellar_evolution wikiPageWikiLink Iron.
- Stellar_evolution wikiPageWikiLink Iron-56.
- Stellar_evolution wikiPageWikiLink Isotope.
- Stellar_evolution wikiPageWikiLink Jupiter_mass.
- Stellar_evolution wikiPageWikiLink Kelvin.
- Stellar_evolution wikiPageWikiLink Kinetic_energy.
- Stellar_evolution wikiPageWikiLink Life.
- Stellar_evolution wikiPageWikiLink Luminosity.
- Stellar_evolution wikiPageWikiLink Luminous_blue_variable.
- Stellar_evolution wikiPageWikiLink Magnesium.
- Stellar_evolution wikiPageWikiLink Main_sequence.
- Stellar_evolution wikiPageWikiLink Maser.
- Stellar_evolution wikiPageWikiLink Mathematical_model.
- Stellar_evolution wikiPageWikiLink Metallicity.
- Stellar_evolution wikiPageWikiLink Milky_Way.
- Stellar_evolution wikiPageWikiLink Mira_variable.
- Stellar_evolution wikiPageWikiLink Molecular_cloud.
- Stellar_evolution wikiPageWikiLink Nebula.
- Stellar_evolution wikiPageWikiLink Neon.
- Stellar_evolution wikiPageWikiLink Neon-burning_process.
- Stellar_evolution wikiPageWikiLink Neutrino.
- Stellar_evolution wikiPageWikiLink Neutron.
- Stellar_evolution wikiPageWikiLink Neutron_star.
- Stellar_evolution wikiPageWikiLink Nova.
- Stellar_evolution wikiPageWikiLink Nuclear_fusion.
- Stellar_evolution wikiPageWikiLink Nuclear_reaction.
- Stellar_evolution wikiPageWikiLink Nucleon.
- Stellar_evolution wikiPageWikiLink Nucleosynthesis.
- Stellar_evolution wikiPageWikiLink O-type_main-sequence_star.
- Stellar_evolution wikiPageWikiLink IR_star.
- Stellar_evolution wikiPageWikiLink Ohio_State_University.
- Stellar_evolution wikiPageWikiLink Oxygen.
- Stellar_evolution wikiPageWikiLink Oxygen-burning_process.