Kuongorora kwokutanga kwakatangira mumakore ekuma1920, apo Frank E. Ross akawana kuti mifananidzo ye ultraviolet yakaratidza tsanangudzo yakawanda yakanga isipo mumagetsi anooneka uye infrared. Akataura kuti izvi zvaive nekuda kweiyo yakasviba, yakasviba pasi pemhepo ine makore akakwirira pamusoro payo. Kuongorora kwe spectroscopic mumakore ekuma1900 kwakapa zviratidzo zvekutanga pamusoro pekutenderera kweVenus. Vesto Slipher akaedza kuchinja Doppler yeVenus, asi haana kuwana chero kutenderera. Akafungidzira kuti nyika inofanira kunge yaive nenguva yakareba yekutenderera kupfuura zvaifungidzirwa. Gare gare muma1950s, kuongorora kwakananga kwakananga kwakaratidza kuti zvinhu zviviri zveVenus zvaive zvizere zvakaonekwa.
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