Their information about stars and habitable planets across the galaxy.

The really big red suns usually didn't have habitable planets.

It was the thought of looking at a habitable planet with a double sun.

"If you're so interested in that habitable planet, why aren't we there already?"

Once Earth received news of a habitable planet, the third and final step took place.

They were slow vessels and would take a long time to reach another habitable planet.

"This is the only habitable planet we have," he said.

Do you know how many habitable planets we already have in place?

He was sure they were lying about there being no habitable planets in the system.

So where are we going to find a habitable planet?