With the name of Kepler 20e, the first planet that has a size smaller than Earth is designated. The radius of Kepler 20e is 0.87 times that of our planet, being even smaller than the planet Venus. Kepler 20e completes an orbit in six days, and its sun is quite similar to ours.
Kepler 20e is located 1,000 light-years away in the constellation Lyra. Its surface is rocky, and has no atmosphere. It was discovered in 2011, and is next to Kepler 20f orbiting a distant star, Kepler 20.
Kepler 20e and Kepler 20f are the two smallest planets ever detected so far in the orbit of a star similar to the Sun. Their high surface temperatures, which are 815 and 426 degrees respectively, prevent housing life forms, at least as We know her.
The composition of Kepler 20e is very similar to that of Earth. It is estimated that, having a similar radius, it is formed by 32 percent iron, which is concentrated in its nuclei, and 68 percent silicates in its mantles.
The researchers studied the data collected by the Kepler space telescope for 670 days. In this period of time up to five traffic signals were recorded periodically in the star Kepler 20. Each signal corresponds to the passage of an object between the star and us, which results in a decrease in its luminosity and reveals the existence of A new planet
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