X ray luminosity

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• X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …   Wikipedia

• Eddington luminosity — The Eddington luminosity (also referred to as the Eddington limit) in a star is defined as the point where the gravitational force inwards equals the continuum radiation force outwards, assuming hydrostatic equilibrium and spherical symmetry.… …   Wikipedia

• X-ray burster — X ray bursters are a class of binary stars which have periodic outbursts luminous in X rays. They contain a neutron star and an accreting companion.Burst AstrophysicsWhen a star in a binary fills its Roche lobe (either due to being very close to… …   Wikipedia

• Ultraluminous X-ray source — An ultra luminous X ray source (ULX) is an astronomical source of X rays that is not in the nucleus of a galaxy, and is more luminous than 1039 erg/s (1032 watts), assuming that it radiates isotropically. Typically there is about one ULX per… …   Wikipedia

• X-ray crystallography — can locate every atom in a zeolite, an aluminosilicate with many important applications, such as water purification. X ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X rays strikes a… …   Wikipedia

• Ultra-high-energy cosmic ray — Unsolved problems in physics Why is it that some cosmic rays appear to possess energies that are theoretically too high? In high energy physics, an ultra high energy cosmic ray (UHECR) or extreme energy cosmic ray (EECR) is a cosmic ray with an… …   Wikipedia

• Chandra X-ray Observatory — ▪ United States satellite  U.S. satellite, one of the National Aeronautics and Space Administration (NASA) fleet of “Great Observatories” satellites, which is designed to make high resolution images of celestial X ray sources. In operation since… …   Universalium

• Small Magellanic Cloud — Small Magellanic Cloud. Source: Digitized Sky Survey 2 Observation data (J2000 epoch) …   Wikipedia

• Large Magellanic Cloud — The Large Magellanic Cloud Observation data (J2000 epoch) Constellation Dorado/Mensa …   Wikipedia

• Proxima Centauri — Coordinates: 14h 29m …   Wikipedia

• Capella (star) — For other uses, see Capella (disambiguation). Capella Aa/Ab Capella is the brightest star in Auriga Observation data Epoch J2000.0     …   Wikipedia