I believe we did originate on a single planet at one time.

Players start out as magistrates in charge of one single planet.

The days when any single planet could live in isolation is over forever.

This system contained only a single planet and no moon.

I never expected to see so much change on a single planet in such a short period.

A decade ago scientists did not know of even a single planet outside our solar system.

It's got a mixture of just about everything you might expect, ever to find on a single planet.

Any single planet can support itself with raw materials and food, at least enough to survive.

A single planet is too big for single me to understand.

The primary star has a single known planet, discovered in 2005.