Search for Earth-like planets and habitable environments around other stars.

The objective is to determine whether the Jupiter system harbors habitable environments.

While the prospects for life on a gas giant are unknown, large moons may be able to support a habitable environment.

And in this case a habitable environment needs to be described.

"We believe at this place on Mars for some period in time, it was a habitable environment."

"If you clean things to a sanitary state or higher, you're creating a more habitable environment," he says.

These conditions together could create a habitable environment, and could persist for several hundred million years.

There was no attempt to learn from the Eskimos, who clearly had learned how to survive in a barely habitable environment.

There are four hundred billion stars in the Galaxy, many of which will provide habitable environments for far longer than a mere billion years.

The Biosphere 2 project built a dome on Earth that contained a habitable environment.