> orbit characteristics Also, our earth did propably produce complex life so well because of the moon stabilizing earths rotation and allowing more or less sta

> orbit characteristics Also, our earth did propably produce complex life so well because of the moon stabilizing earths rotation and allowing more or less stable climate. The mass ratio of moon/earth is comparably larger then other satellite systems, which, encorporated into the model of habitable zones, would make them much less common. Also, jupiter has a significant role in shielding earth from asteriods. Another aspect of stability. I agree, habitable zone is way more than just distance to star or enough gravity for an atmosphere and liquid water.