How many miles would Earth have to move closer to or further from the Sun for mankind to cease to exist?

Answer 1

So many factors to consider of which include technology and mankind's ability to survive in the harshest of climates. That being said I suggest to you that our greatest challenge to be that of water and food supply rather than man's ability to overcome or withstand any radical temperature change. Our demise would be of starvation and civil unrest, not the effect of a warmer or cooler climate would have physically on human beings. The distance between our nearest pass of the Sun and our furthest is approximately 5.1 million Kb or about 3.5 degrees variance and as humans we do pretty well physically during the peak at either end. What saves us during our furthest point out from the sun is the direct sunlight we receive (northern hemisphere) and the length of time during the day we are exposed to the Sun. So many factors, so little time...

Answer 2

The Earth's orbit is particularly eccentric, and so it quite is slightly closer to the sunlight in December than at different instances of the twelve months. this version occurs each and every twelve months. Over instances of one hundred thousand years, the Earth's orbit will become extra eccentric and much less eccentric, often as a results of interactions with Jupiter. those are referred to as Milankovich cycles, and are partly in charge for Ice a while. the area to the sunlight averaged over the twelve months continues to be the comparable over very long sessions of time (hundreds of thousands of years), regardless of the undeniable fact that.

Answer 3

Hi. First you have to determine a temperature at which human life ceases. Then apply the inverse square law to determine the radiation increase needed to reach that temperature. My guess would be about 25 million miles or so.

Answer 4

earth's distance from the sun varies by a couple million miles throughout the year since its orbit isn't prefectly circular,
obviously that doesn't have much effect on life so it probably would have to be tens of millions of miles

Answer 5

if you're looking for a quantitative number like X number of miles you probably wont get it. But it wont really be that much i read that only a 5 degree decrease brought about the last ice age.

Answer 6

Move past Mars, get sizzled with radiation, move towards the sun, get sizzled by radiation, move towards the outer planets and freeze to death. We are fine where we are and I hope we never change our position in the solar system.

Answer 7

I don't know the exact miles but perhaps anywhere in Venus's orbit or Mar's orbit. One is just too far and the other is just too close.

Answer 8

Ouch, that's a tough one...I think our atmospheric gases play a big role here.

Mars is in that predicament...maybe if we find a Martian he can tell us...just kidding...we know there aren't any martians.