There is currently only one astrononical definition for the tag 'electromagneticwave'.
electromagnetic radiation, electromagnetic wave
cerenkovradiation, xrayradiation, blackbodyradiation, bremsstrahlung, continuumradiation, cyclotronradiation, gammarayradiation, infraredradiation, microwaveradiation, millimeterradiation, polarizedlight, polarizedradiation, radioradiation, submillimeterradiation, synchrotronradiation, thermalradiation, ultravioletradiation, visibleradiation
planckblackbodyformula, color, darkness, effectivetemperature, electrostaticwave, fluxdensity, gravitationallensing, lamp, lightabsorption, lightinterference, lightpolarization, lightscattering, luminescence, photon, radiativeequilibrium, recombinationline, refraction, solarconstant, wavelength