A few fun facts:
Kepler-10c is 2.227 Earth radii with a similar density so it’s HUGE for a rocky planet, 17 times larger than Earth. A fact that has scientists scratching their heads on how this could be, it was thought not possible.
The parent star Kepler 10 is similar to our own Sun. Kepler-10c orbits much closer to its sun than we do ours, only 25 percent as far, this means of course the planet is hot somewhere near 212 oC / 413oF. It’s also orbits very quickly, a Kepler-10 c year is only 45.29 days.
Visit the Kepler page for all the details including how the planet was discovered.
Here is the Kepler press release:
Astronomers have discovered a rocky planet that weighs 17 times as much as Earth and is more than twice as large in size. This discovery has planet formation theorists challenged to explain how such a world could have formed.
“We were very surprised when we realized what we had found,” says astronomer Xavier Dumusque of the Harvard-Smithsonian Center for Astrophysics (CfA), who led the analysis using data originally collected by NASA’s Kepler space telescope.