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
X-ray binary — Artist s impression of an X ray Binary X ray binaries are a class of binary stars that are luminous in X rays. The X rays are produced by matter falling from one component, called the donor (usually a relatively normal star) to the other… … Wikipedia
X-ray source — ▪ astronomy in astronomy, any of a class of cosmic objects that emit radiation at X ray wavelength. Because the Earth s atmosphere absorbs X rays (X ray) very efficiently, X ray telescopes and detectors must be carried high above it by… … Universalium
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
Chandra X-ray Observatory — and Inertial Upper Stage sit inside the payload bay on Space Shuttle Columbia mission STS 93 General information … Wikipedia
Be-Stern — Ein Be Stern oder OeBeAe Stern ist ein früher Stern mit zeitlich veränderlichen Emissionslinien in den Fraunhoferlinien, was durch das Suffix e für engl. emission lines hinter dem B für die Spektralklasse angegeben wird. Inhaltsverzeichnis 1… … Deutsch Wikipedia
Cygnus X-1 — For other uses, see Cygnus X 1 (disambiguation). HDE 226868 HDE 226868 (not shown) is located next to the star η (lower center) in this map of constellation Cygnus … Wikipedia
Binaire X — Le microquasar GRO J1655 40, vue d artiste (ESA/NASA) Une binaire X est formée d une étoile « normale » orbitant autour d une étoile à neutrons ou d un trou noir avec une courte période. Le rayonnement X provient de l énorme quantité d… … Wikipédia en Français
Cygnus X-3 — Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) Constellation Cygnus Right ascension 20h 32m 25.78s[1] … Wikipedia
Circinus X-1 — from the Chandra X ray Observatory. Circinus X 1 is an X ray binary star system that includes a neutron star. Observation of Circinus X 1 in July 2007 revealed the presence of X ray jets normally found in black hole systems; it is the first of… … Wikipedia
