The Earth is moving away from the Sun a bit every year, yes? How long until Earth couldn't support life because of this?
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answers:
Dole Bludger say: The sun is getting hotter on its own.
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Jim say: The Sun is also getting hotter. Most scientists believe that life will end on Earth when the Sun causes Earth to be too hot to support life. That is supposed to happen in about 1 billion years when the Sun is 10% brighter than now.
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retired old sarge say: It cant be moving away... if it is then how is so called global warming happening...
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Paula say: That will never happen.
The distance is too small to make any difference.
And it is a complex matter. It is not something that will concern os for a long time.
The sun is getting hotter as hydrogen is converted to helium in its core.
The sun gets about 10% hotter each billion years.
In a mere half billion (=500 million) years the earth will be significantly warmer so that water in the oceans will begin to evaporate.
That is offset by the earth moving away from the sun.
The sun loses mass due to its solar wind and conversion of hydrogen into energy in its core. As the sun loses mass the earth (and all the planets) move further from the sun.
Eventually, humans will have to leave the earth, or die as earth becomes too hot to support life. That point is still perhaps 2 billion years in the future.
Those two processes compensate each other to some extent.
read this for the predicted future of earth
https://en.wikipedia.org/wiki/Earth#Futu...
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ignoramus say: The Earth will not be able to support life for much longer in the present orbit anyway.
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Morningfox say: The average distance is increasing by about 1 meter per century. Since the normal swing around the average is +/- 2,500,000 kilometers per year, it's going to be a very long time before this is going to affect life on Earth. It's about 25 BILLION years, by my calculations.
A long time before that happens, the sun is going to increase its heat, and boil off all the water from Earth. Maybe even melt all the rocks.
(Yes, there were some old reports that the distance is increasing at 15 meters per century. But more recent studies put the value at around 1 to 1.5 meters per century.).
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Bill say: is the erath moving away from the sun
science has shown that all planets eventually crash into the sun and form a super nova
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say: At 1.5cm per year, a very long time. The Moon, via the tides it creates, is stealing Earth's rotational momentum, so too is the Earth with a much, much smaller respect to the sun (I micrometer). The sun too, is losing mass and that means the Earth moves outwards very slowly as a result. (like 1.5cm per year)
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quantumclaustrophobe say: The distance is negligible, and is offset by the fact that the sun is brightening as time goes on... in about a billion to a billion and half years, the sun's output will be so much that life on Earth will no longer be possible.
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Ronald 7 say: I don't know about you
But I have a fur coat
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Forty Licks say: Its all guesswork. Nobody really knows
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CarolOklaNola say: A very VERY long te. The Sun will expa d in the fed giant stage and may consume both the Earth and the Moon. The Moon is getting farther from Earth by 1.625 inches 3.8 centimeters per year.
Earth is moving away like 2 trillionths of a centimeter a year. Earth's distance from the Sun changes by 5 MILLION kilometers EVERY YEAR.
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drake say: I didn’t know this. I’d think it would be moving closer because the little bit of air there is in the vacuum slows earth down. This means it covers less horizontal distance parallel to the sun’s surface. If this is true, in conjunction with its centripetal acceleration, it will eventually fall into the sun because the amount of distance covered horizontally would not be enough for the earth to fall vertically with the sun’s surface.
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Chase say: You would be dead before earth gets too far away
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vote_libertarian_in_2008 say: Millions and millions of years.
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Dixon say: I don't know if it is moving away or not but the Sun will go red giant and engulf the Earth long before orbital radius becomes an issue.
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