Question
What determines the inner edge of the habitable zone around the Sun?
A) Run-away greenhouse effect
B) Strong-enough greenhouse effect to allow liquid surface water to exist
C) Volcanism, providing a significant planetary energy source
D) Tidal activity between the planet and the Sun
E) Strength of planet-planet gravitational interaction
A) Run-away greenhouse effect
B) Strong-enough greenhouse effect to allow liquid surface water to exist
C) Volcanism, providing a significant planetary energy source
D) Tidal activity between the planet and the Sun
E) Strength of planet-planet gravitational interaction