Which of the following best describes the Goldilocks Zone?
1
A region in the solar system beyond Neptune, populated by icy bodies and dwarf planets like Pluto.
2
A region around a star where conditions are just right for liquid water to exist on a planet's surface.
3
A point in space where the gravitational forces of two large bodies balance the centripetal force felt by a smaller object.
4
A spherical shell of icy objects surrounding the solar system at a distance of about 2,000 to 200,000 AU.