CZ:Core Articles/Astronomy

HR Diagram: Add brief definition or description Neutron star: Add brief definition or description William Herschel: Add brief definition or description Asteroid belt: Add brief definition or description Binary star: Add brief definition or description Celestial coordinates: Any of a number of reference systems designed to specify the positions of celestial objects. [e] Celestial mechanics: Study of the application of the laws of physics to the motions of planets, satellites, and other celestial objects. [e] Cepheid variable: Pulsating variable star which exhibits a relation between period of variation and absolute luminosity as a result of which they are good indicators of cosmic distances. [e] Cosmic microwave background: Add brief definition or description Cosmic rays: Add brief definition or description Eros (asteroid): Add brief definition or description Flare star: Add brief definition or description Galilean satellites: Add brief definition or description H I region: Add brief definition or description H II region: Add brief definition or description Halley's comet: Add brief definition or description Hubble constant: Add brief definition or description Magellanic Clouds: Add brief definition or description Nebula: Add brief definition or description Nova: Add brief definition or description Orion nebula: Add brief definition or description 2006 definition of planet: Add brief definition or description Extrasolar Planet: Add brief definition or description Scattered disc: Add brief definition or description Meteroid: Add brief definition or description Dust: Add brief definition or description Oort Cloud: Add brief definition or description Walter Baade: Add brief definition or description Friedrich Bessel: Add brief definition or description Planetary nebula: Add brief definition or description Pleiades: Add brief definition or description Proper motion: Add brief definition or description Pulsar: Add brief definition or description

Quasar: Add brief definition or description Solar eclipse: Add brief definition or description Solar wind: Add brief definition or description Star formation: Add brief definition or description Stellar evolution: Add brief definition or description Stellar parallax: Add brief definition or description Stellar populations: Add brief definition or description Sunspots: Add brief definition or description White dwarf: Add brief definition or description Henrietta Leavitt: Add brief definition or description Edward C. Pickering: Add brief definition or description Henry Norris Russell: Add brief definition or description Harlow Shapley: Add brief definition or description European Space Agency: Add brief definition or description Royal Astronomical Society: Add brief definition or description Palomar Observatory: Add brief definition or description Annie Jump Cannon: Add brief definition or description Alvan Clark: Add brief definition or description George Ellery Hale: Add brief definition or description Edwin Hubble: Add brief definition or description Gerard Kuiper: Add brief definition or description