“The Iron Planet” –First Alien Body Discovered Forged in a Catastrophic Collision

Kepler 107 Collision

 

Astronomers believe that a catastrophic collision stripped off the silicate mantle, leaving only the 70 percent iron core of the two exoplanets that exist in the newly discovered Kepler 107 star system. The two alien objects have almost identical radii of 1.5 and 1.6 Earth radii, but have widely disparate densities.

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