Earth, the only planet in the Universe, known to harbour life. And life on Earth has flourished, some say maybe too successfully. If everyone ate like an average American, we would need four Earths. Whew! I’m sure glad we don’t all eat like average Americans.

A Super-Earth is a planet bigger than earth, not as big a Uranus and Neptune. These ice giants are 15 and 17 times more massive. Forget about gas giants like Saturn and Jupiter, they’re even bigger.

No, a super-Earth is somewhere between Earth and Uranus.