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Einstein Observatory |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.03 sec. |
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Einstein Observatory: see X-ray astronomy X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X rays.
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