the branch of astronomy dealing with the study of astronomical objects which emit X-rays, and the methods used to detect such objects.
A branch of astronomy which deals primarily with X-Rays.
There are certain objects in and beyond the galaxy, such as supernova remnants and certain sorts of binary systems, which emit electromagnetic radiation at very high frequencies, these are known as X-rays. There are also more powerful x-ray sources outside the galaxy such as pulsars. These events can thus be observed better with telescopes designed to see these wavelengths than with ordinary optical telescopes. The main problem with these telescopes is that the Earth's atmosphere is opaque to X-rays. This means that ground-based X-ray telescopes are not very useful. Therefore these telescopes are now normally launched on satellites. The University of Leicester is particularly strong in this field. Information can be found at www.star.le.ac.uk.
(a) Detection of stellar and interstellar X-ray emission. Because X-rays are almost entirely filtered out by the Earth's upper atmosphere, the use of balloon- and rocket-borne equipment is essential. [A84] (b) Astronomy carried out in the waveband roughly 0.1-100 keV. The atmosphere is opaque to radiation at these wavelengths and so observations have to be carried out from above the Earth's atmosphere. It has been found that many classes of object are X-ray emitters, including stars, supernovae and active galaxies. [D89
The field of astronomy that studies celestial objects by the x-rays the emit.
X-ray astronomy studies celestial objects by looking at the x-rays that they give off.
X-ray astronomy is an observational branch of astronomy, which deals with the study of X-ray emission from celestial objects. X-ray radiation is absorbed by the Earth's atmosphere, so instruments to observe X-rays must be taken to high altitude, in the past with balloons and sounding rockets. Nowadays, X-ray astronomy is part of space research and X-ray detectors are placed in satellites.