A size comparison of the exoplanets Kepler-20e and Kepler-20f with Venus and Earth. Wikipedia.

What If the Universe Were a Playground And the Planets Marbles

Johannes Kepler was a German astronomer, mathematician, and astrologer.

I demonstrate by means of philosophy that the earth is round, and is inhabited on all sides; that it is insignificantly small, and is borne through the stars. ~Johannes Kepler.