Wiktionary
n. (context astronomy English) The zone around a star where a planet could experience temperatures like those on Earth, allowing for the possible existence of liquid water and of life.
Usage examples of "habitable zone".
Scott had excused himself to begin work on the impulse engines, but Kirk and McCoy had accepted Joray's invitation to see firsthand what Rimillia's habitable zone looked like.
Just what medium was it traversing now, at some unknown depth beneath the habitable zone?
Its located just outside the traditional habitable zone boundaries, but the gas giant exacts tidal stresses enough to keep the surface warmed in the liquid water range.
There were eleven planets circling a G-type star--seven gas giants, two burned-out cinders too close to the primary for anything resembling humanoid life, and two fair-sized planets located in the habitable zone.
Pulefen, District Thirty, is in the extreme northwest of the habitable zone of Orgoreyn, bounded by the .
Of the smaller worlds, two lay in the habitable zone for Earth-like life—.
Of the smaller worlds, two lay in the habitable zone for Earth-like life - seven times as far as Earth from Sol - and one lay further out, in a region which might support ammono-like life.
But the temperate regions are shrinking, and we are very near the northern border of the habitable zone, at least by some standards.
Be that as it may, the habitable zone of this planet is already little more than a narrow strip, five or six hundred kilometers wide, along the southern coast of Terra Grande.
Before it swelled, the planets closer in would have been in the habitable zone, and this planet would have been too far from the star to be congenial to life.
We've analyzed the variation or wiggle in its path and we believe the object in question is a low-mass planet that occupies the star's habitable zone.