X-ray-astronomy
the branch of astronomy that studies celestial objects by means of the x-rays emitted by them.
noun
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
x-ray astronomy
the study of celestial objects by measurement of the x-rays they emit. because the earth’s atmosphere absorbs x-rays, x-ray detectors are usually carried into sp-ce on satellites. x-rays are emitted by high-energy objects such as active galactic nuclei, supernova remnants, x-ray binary stars, neutron stars, and the regions around black holes. objects which do not produce their own x-rays can reflect radiation from nearby stars, making it possible to study the objects using x-ray astronomy; one notable example of this is the -n-lysis of solar x-rays reflected by the moon.
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a celestial source from which bursts of x-rays are received.
- X-ray-crystallography
the determination of the structure of a crystal by the use of x-ray diffraction. noun the study and practice of determining the structure of a crystal by p-ssing a beam of x-rays through it and observing and -n-lysing the diffraction pattern produced x-ray crystallography the study of molecular structure by examining diffraction patterns made by […]
- X-ray-photograph
a radiograph made with x-rays. historical examples the memory of mars raymond f. jones punch or the london charivari, vol. 147, july 8, 1914 various the power and the glory grace macgowan cooke the vanishing man r. austin freeman manual of surgery volume second: extremities–head–neck. sixth edition. alexander miles
- X-ray-spectrometer
a spectrometer using x-rays to activate the inner electrons of an atom in order to separate and identify the chemical const-tuents of a substance and their concentrations.
- X-ray-spectrometry
the use of an x-ray spectrometer.