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Kepler-20 system is home of first discovered Earth-size exoplanets

This graphic shows the sizes of Kepler 20e and Kepler 20f relative to Venus and Earth. Credit: Courtesy Harvard-Smithsonian Center for Astrophysics

This graphic shows the sizes of Kepler 20e and Kepler 20f relative to Venus and Earth.
Kepler 20e, the second planet in the Kepler-20 system about 950 light years from Earth, has an average surface temperature of about 1,400 degrees Fahrenheit.
Kepler 20f, the fourth planet in the Kepler-20 system, has a surface temperature of about 800 degrees Fahrenheit.
This graphic explains the transit method used by researchers to verify the existence of exoplanets.
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Kepler-20 system is home of first discovered Earth-size exoplanets

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