) are caused by this small variation of a million miles or less.And there is no assurance that it could not increase again to make a new Ice Age develop over just a few years.-Not exactly perfect, considering it moves almost a million miles closer to and away from the sun every so often (the orbit isnt a perfect circle,) but its commonly referred to as the Habitable zone or the Goldilocks zone that the Earth is in.-everything has to be someplacethe goldilocks region is rather wide it is at a distance where there can be liquid water which seems necessary for lifeit is more complicated than that.......
By the way, there is a very long term variation in the distance, over many years. It is believed that past Ice Age periods and warm periods (like the last 10,000--20,000 years?) are caused by this small variation of a million miles or less. And there is no assurance that it could not increase again to make a new Ice Age develop over just a few years.
Not exactly perfect, considering it moves almost a million miles closer to and away from the sun every so often (the orbit isn't a perfect circle,) but it's commonly referred to as the Habitable zone or the Goldilocks zone that the Earth is in.
