What is the name of the habitable zone around a star where liquid water could exist?

What is the name of the habitable zone around a star where liquid water could exist? The answer is the circumstellar habitable zone.

The circumstellar habitable zone is the region around a star where conditions could allow liquid water to persist on a planet's surface. It is often nicknamed the Goldilocks zone because it is neither so close that water would generally vaporize nor so far away that it would freeze.

The zone is not a fixed distance for every star. A brighter, hotter star has a habitable zone farther out, while a cooler red dwarf's zone lies much closer. The boundaries also depend on atmospheric composition, pressure, clouds, and greenhouse warming. For that reason, being in the zone does not prove that a planet is habitable or contains life.

In our Solar System, Earth lies comfortably within the conventional habitable zone. Mars is near its outer edge, while Venus is near the inner edge, but Venus's dense atmosphere drives extreme surface temperatures. Astronomers distinguish the potentially habitable orbital region from the planet itself: a world still needs a suitable atmosphere, sufficient pressure, and other conditions for stable surface water.