How is the Habitable Zone (HZ) precisely defined in relation to Earth's orbital location?

Answer

The region where temperatures permit water to exist in liquid form on the surface

The Habitable Zone is precisely defined by astronomers as the celestial neighborhood where the temperatures allow liquid water to remain on a planetary surface, a non-negotiable requirement for life as currently understood.

How is the Habitable Zone (HZ) precisely defined in relation to Earth's orbital location?
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