Thanks to NASA's Kepler and Spitzer Space Telescopes, scientists have
made the most precise measurement ever of the radius of a planet
outside our solar system. The size of the exoplanet, dubbed Kepler-93b,
is now known to an uncertainty of just 74 miles (119 kilometers) on
either side of the planetary body.
The findings confirm Kepler-93b as a "super-Earth" that is about
one-and-a-half times the size of our planet. Although super-Earths are
common in the galaxy, none exist in our solar system. Exoplanets like
Kepler-93b are therefore our only laboratories to study this major class
of planet. Read more.
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