The Other Red Planet: Soviet Union Scored an Interplanetary First at Venus 45 Years Ago

If Venus's pass across the sun earlier this week yields a bounty of information for hunters of transiting worlds in other planetary systems, it's because Venus is a known entity. Studying the June 5 Venus transit as if it were a faraway exoplanet “gives us a reality check,” says planetary physicist Colin Wilson of the University of Oxford. “We can check on all those exoplanet techniques to see how accurate they really are.” Such data may enhance NASA's Kepler mission as well as the many ground-based campaigns using planetary transits to identify distant worlds, a method that has led to the discovery or characterization of more than 200 exoplanets.

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The Other Red Planet: Soviet Union Scored an Interplanetary First at Venus 45 Years Ago