x-ray astronomy

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x-ray astronomy

n.
The branch of astronomy that uses observations of emissions in the x-ray part of electromagnetic spectrum to study extraterrestrial sources such as stars, galaxies, and interstellar gas clouds.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

X-ray astronomy

n
(Astronomy) the branch of astronomy concerned with the detection and measurement of X-rays emitted by certain celestial bodies. As X-rays are absorbed by the atmosphere, satellites and rockets are used
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

x-ray astronomy

The branch of astronomy dealing with the detection of objects in space by means of the x-rays they emit.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
No sign of the ULX was found in historical X-ray images made with Einstein Observatory in 1980, ROSAT in 1994, the European Space Agency's XMM-Newton in 2003 and 2008, or NASA's Swift observatory in 2005.
But four decades of space-based research from telescopes such as the Einstein Observatory, the Chandra X-ray Observatory, and XMM-Newton have helped astronomers transcend Earth's limitations.
There have been several very successful X-ray telescopes in space, including the Einstein observatory and the Roentgen satellite (ROSAT).
X-ray mission since the Einstein Observatory in 1979, will study variations as small as one-millionth of a second in the X-ray output of such compact objects as black holes, neutron stars, and white dwarfs in the Milky Way.
Geological Survey's GLORIA Data -- East Coast, or the Smithsonian Astrophysical Observatory's The Einstein Observatory Catalog of HRI X-Ray Sources, The Einstein Observatory Catalog of IPC XRay Sources, or The Einstein Observatory Slew Survey.
2 (HEAO 2), renamed the Einstein Observatory, carrying a sizable X-ray telescope; the other was the International Ultraviolet Explorer (IUE).

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