aiir

Earth engulfed by sun, painful?

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here they say after about a billion years the sun will become hot enough to boil our oceans, will this cause animals and humans any pain? and if not will a few billion years later, the sun will become a red giant so large that it will engulf our planet; will this cause a long painful death or a quick death?....

thanks.

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2 hours ago, aiir said:

here they say after about a billion years the sun will become hot enough to boil our oceans, will this cause animals and humans any pain? 

thanks.

I suspect it will hurt at least as much as a poke in the eye with a sharp stick.

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Long before the earth gets enveloped, the change in temperature from the growing approaching sun will cause drought, famine, and related catastrophe. On human timescales, it will be slow, painful, and horrible. On galactic timescales, the entire history of humanity is a blink of an eye. Fortunately, we’ll almost certainly all long be gone before it matters. 

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If you absolutely know the house is burning down and you can't do anything about it, you don't ask, "How painful will it be if we just sit here?" If it takes us more than a billion years to find a safer neighborhood, then we deserve to cook.

12 hours ago, zapatos said:

I suspect it will hurt at least as much as a poke in the eye with a sharp stick.

LOL. My mom was Missouri folk, and she used that expression when things didn't turn out quite right. "Beats a poke in the eye with a sharp stick." 

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1 hour ago, Phi for All said:

If you absolutely know the house is burning down and you can't do anything about it, you don't ask, "How painful will it be if we just sit here?" If it takes us more than a billion years to find a safer neighborhood, then we deserve to cook.

LOL. My mom was Missouri folk, and she used that expression when things didn't turn out quite right. "Beats a poke in the eye with a sharp stick." 

I read about a study made a few years back that looked into the feasibility of  moving the Earth away from the Sun as it warms.   It considered using asteroids or other bodies for gravity-slingshot type fly-bys that would be used to slowly boost the Earth in its orbit in order to keep it in the habitable zone as the Sun warmed. (Most of the action in Larry Niven's novel A World Out of Time  takes place on an Earth that has been moved out to be a moon of Jupiter for this purpose.)

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1 hour ago, Janus said:

I read about a study made a few years back that looked into the feasibility of  moving the Earth away from the Sun as it warms.   It considered using asteroids or other bodies for gravity-slingshot type fly-bys that would be used to slowly boost the Earth in its orbit in order to keep it in the habitable zone as the Sun warmed. (Most of the action in Larry Niven's novel A World Out of Time  takes place on an Earth that has been moved out to be a moon of Jupiter for this purpose.)

I wonder what complexity, if any, the presence of the moon would add to the process? Just avoid hitting it, or something more involved?

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In the last 120 years, we've gone from a man in a kite gliding a few yards, to people living in space for a year, or travelling to the Moon.

In a billion years, we should be able to live as far away from the Sun as we like, and have plenty of humans orbiting other stars. 

In any case, the odds of a major extinction event on Earth are very high due to a major collision, long before the Sun starts to swell.

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