A "habitable zone" is the region around a star where conditions might be just right for liquid water to exist on a planet's surface. This zone is often referred to as the "Goldilocks Zone" because it's not too hot and not too cold, making it potentially suitable for life as we know it. The distance from the star determines the temperature, and different stars have different habitable zones. Planets within this zone, like those in the Solar System such as Earth and Mars, are of particular interest to scientists. Finding exoplanets in their star's habitable zone can help researchers understand where life might exist beyond our planet.