The distance between our earth and the Sun is essentially what regulates our global temperature – if the distance were smaller, our planet would be too hot to live on. Conversely, if the distance were greater, our planet would be too cold to live on. Since Earth’s distance from the sun was established well before life itself, all plant/animal life is directly linked to that distance.
In addition to the global temperature mentioned above, the distance affects the earth’s ability to create a magnetophere, which shields the earth from solar radiation. The magnetopshere deflects harmful light, such as ultraviolet and gamma rays, around the planet. If we didn’t have a correct magnetophere, Earth would be uninhabitable due to such high radiation at the surface.
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