radio pulsars

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• Pulsars — Pulsar Pour les articles homonymes, voir Pulsar (homonymie). Un pulsar est le nom donné à une étoile à neutrons, tournant très rapidement sur elle même (période typique de l ordre de la seconde, voire beaucoup moins pour les pulsars milliseconde) …   Wikipédia en Français

• PULSARS — Le premier pulsar fut découvert par hasard, en 1967, par les astronomes britanniques Anthony Hewish et Jocelyn Bell, qui étudiaient la scintillation de sources célestes radio provoquée par la turbulence du gaz ionisé interplanétaire. Toutes les… …   Encyclopédie Universelle

• Radio astronomy — is a subfield of astronomy that studies celestial objects at radio frequencies. The field originated from the discovery that many astronomical objects emit radiation in the radio wavelengths as well as optical ones. The great advances in radio… …   Wikipedia

• radio and radar astronomy — Study of celestial bodies by measuring the energy they emit or reflect at radio wavelengths. It began in 1931 with Karl Jansky s discovery of radio waves from an extraterrestrial source. After 1945, huge dish antennas, improved receivers and data …   Universalium

• Radio-quiet neutron star — A radio quiet neutron star is a neutron star that does not seem to emit radio emissions like most other neutron stars. Most neutron stars are pulsars, and emit radio radiation.Quark stars, theoretical neutron star like objects composed of quark… …   Wikipedia

• radio source — Astron. a cosmic object or phenomenon, as a galaxy, pulsar, quasar, or the remnant of a supernova or of a galactic collision, that emits radio waves. [1945 50] * * * ▪ astronomy       in astronomy, any of various objects in the universe that emit …   Universalium

• Radio telescope — A radio telescope is a form of directional radio antenna used in radio astronomy and in tracking and collecting data from satellites and space probes. In their astronomical role they differ from optical telescopes in that they operate in the… …   Wikipedia

• Radio-Activity — For other uses of Radio activity and radioactivity , see Radioactive (disambiguation) . Infobox Album | Name = Radio Activity Type = studio Artist = Kraftwerk Released = December 1975 Recorded = Kling Klang Studio, Düsseldorf Genre = Electronic… …   Wikipedia

• Pulsars —    Stars that are a distinct source of radio, optical and x ray pulses. They pulse every fraction of a second, to several seconds. These pulses are very constant. It is believed that Pulsars are stars that have collapsed under their own gravity,… …   The writer's dictionary of science fiction, fantasy, horror and mythology

• Ooty Radio Telescope — Radio Telescope at Ooty Organization Tata Institute of Fundamental Research …   Wikipedia

• Astronomical radio source — Radio sources are objects in outer space that emit strong radio waves. Radio emission comes from hot gas, electrons spiraling in magnetic fields and specific wavelengths emitted by atoms and molecules in space.In 1932, radio astronomer Karl… …   Wikipedia