An fara binciken ultraviolet na farko a cikin 1920s, lokacin da Frank E. Ross ya gano cewa hotunan ultraviolet sun bayyana cikakkun bayanai waɗanda ba su kasance a cikin radiyo mai gani da infrared. Ya ba da shawarar wannan ya kasance saboda ƙarancin rawaya, ƙananan yanayi tare da manyan girgije cirrus sama da shi. Binciken Spectroscopic a cikin 1900s ya ba da alamomi na farko game da juyawa na Venus. Vesto Slipher yayi ƙoƙari ya canza Doppler na Venus, amma bai iya gano wani juyawa ba.
Venus