Habitable zone

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In astronomy, the "habitable zone" refers to regions in space around stars that allow for optimal conditions either for the emergence of native life via abiogenesis or for Terrestrial life to live in. These zones are usually a region of space described between two circles or spheres in which a planet, asteroid belt, or space station may orbit through. The margin of space between these two circles or spheres may vary in thickness and distance from the host star depending on the size, type, and age of the star, as well as the size and type of planet. This is also commonly known as the Goldilocks zone because it has conditions which are "just right" for life.

Arguments

A less sophisticated version of the fine tuning argument or anthropic principle is as follows

If the Earth were just a few miles further away from the sun, it would be too cold for life to exist, and if the earth were just a few miles close to the earth, it would be too hot for life to exist. Surely you can see the intelligent design in that!
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