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Definitions of astronomical:



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Alternative Terms
spectroscopy wavelength optical-spectroscopy-spectroscopy micrometer spectroscope gamma-ray-astronomy radio-astronomy satellite-astronomy ultraviolet-astronomy x-ray-astronomy spectrograph-3 slit collimator disperse diffraction-grating prism detector optical-spectrograph charge-coupled-device spectrum objective-prism astronomical-catalog optical-fiber diffraction dispersal bundle gaseous michelson-interferometer interferogram infrared-spectroscopy interferometry quasar astronomy electromagnetic-spectrum electromagnetic-radiation radiant-energy star doppler-effect sir-isaac-newton sun triangular-prism rainbow spectral-line joseph-von-fraunhofer letter metre oxygen hydrogen sodium iron molecule calcium angelo-secchi stellar-classification energy-level stellar-atmosphere balmer-series joseph-norman-lockyer helium corona coronium nickel stellar-evolution black-hole extrasolar-planet nebula andromeda-galaxy galaxy cat-s-eye-nebula william-huggins ira-sprague-bowen doubly-ionized-oxygen vacuum forbidden-mechanism edwin-hubble local-group hubble-s-law big-bang-theory fritz-zwicky dark-matter radio redshift planet asteroids mineral gas-giants silicate comet solar-wind organic-compound ocean life interstellar-medium-2 panspermia gunn-peterson-trough lyman-alpha-forest photometry spectrometer emission-spectrum supergiant-star