What Would Happen if the Sun Suddenly Stopped Emitting Energy?

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Discussion Overview

The discussion explores the hypothetical scenario of the Sun suddenly ceasing to emit energy, examining the potential consequences for Earth and its inhabitants. Topics include atmospheric retention of heat, gravitational effects, survival strategies, and the fate of celestial bodies.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants speculate on how long Earth's atmosphere would retain heat before freezing conditions set in.
  • There are differing views on whether Earth would drift away from its current trajectory without the Sun's gravitational pull, with some suggesting it would not notice immediate changes.
  • One participant proposes that if the Sun disappeared, the moon would not crash into Earth, as it orbits the planet independently of the Sun's gravity.
  • Participants discuss the potential for using artificial light and geothermal heat to sustain life in the absence of sunlight.
  • Some suggest that underground cities powered by nuclear or geothermal energy could be a solution for survival.
  • There are humorous and speculative contributions about the fate of other celestial bodies, including the collision of Jupiter and Saturn and the creation of a new star.
  • One participant humorously mentions stockpiling garlic and silver to protect against vampires, indicating a light-hearted tone in parts of the discussion.

Areas of Agreement / Disagreement

Participants express a range of views with no clear consensus on the outcomes of the scenario. Many ideas are speculative and explore various survival strategies, while some participants challenge or refine earlier claims without reaching agreement.

Contextual Notes

Participants mention various assumptions, such as the rate of cooling and the effects of gravitational changes, but these remain unresolved. The discussion includes a mix of serious and humorous contributions, reflecting a broad range of perspectives.

Who May Find This Useful

Readers interested in theoretical physics, astronomy, survival strategies in extreme scenarios, or speculative discussions about the future of humanity may find this thread engaging.

  • #31
Poop-Loops said:
Tides.
Ok, then - also unless you were taking highly precise measurements of the tides, you wouldn't notice until much longer either.
 
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  • #32
dst said:
We do have about 30,000 nukes waiting to be used. Just bunch them up on one side of the Earth (I know the location 99% of people reading this will have in mind) and let rip towards Alpha Centuari.

That's still a ping pong ball hitting the Titanic.
 
  • #33
Since about 30% of the Sun's energy is reflected, you could increase the effective percentage of geothermal and tidal energy a bit, but they still essentially add to about zero.
At something like -250 C - there will be no tides. There will be no liquid - except possibly hydrogen - on the surface.

If the Earth's temperature were to drop to -250 C in 4 days, people would not have time to collect at geothermal centers - of which there are few. There would be no food, no water, no medicine, no air (that's frozen), no electricity. The Earth would be a desert wasteland.

End of story.
 
  • #34
Astronuc said:
At something like -250 C - there will be no tides. There will be no liquid - except possibly hydrogen - on the surface.

If the Earth's temperature were to drop to -250 C in 4 days, people would not have time to collect at geothermal centers - of which there are few. There would be no food, no water, no medicine, no air (that's frozen), no electricity. The Earth would be a desert wasteland.

End of story.

But there'll be sequel, right? :frown:
 
  • #35
I suppose some people could survive if they had a supply of fossil fuel to provide heat to melt the air etc... but it does not sound a great deal of fun.

I guess you might get some benefit from super conductors at absolute zero though.

Sounds like the best place to be would be on a space station.

Also you could let off the worlds entire nuclear weapon supply at a safe distance (arms length) to gain a bit of extra heat.
 
  • #36
esbo said:
I suppose some people could survive if they had a supply of fossil fuel to provide heat to melt the air etc...

Of course, it would be a bit hard to ignite in the absence of air...
 
  • #37
Danger said:
Of course, it would be a bit hard to ignite in the absence of air...

Well you would have a while to light it before the air froze.
 
  • #38
esbo said:
Well you would have a while to light it before the air froze.

Touche.
Damn, I hate it when someone gets in the last word on me. :-p
 
  • #39
my guess would be that the areas not near water, or the ocean effect, would drop about 15 to 20 degrees a day, until it reached what the polar regions are when there is no sun----that is, to about minus 50 to minus 80 F.

As soon as the oceans cool, that's when every thing would definitely drop even lower. And with no sun, the plants would die off---I can't remember who determined exactly as to how fast after the meteorite hit that most of the vegetation died off, but I'd guess a week to three weeks, and it wouldn't help the plants as the temp drops below zero everywhere--end result: no new food production or oxygen production.

So besides the suicides, murders over food, riots, the temps so cold, no natural light to get around, etc. --I'd say 90% of the population gone within two months-95% gone in six months-99.99999% gone within a year---the rest gone within two to three years, except maybe some, 5000-10000, within some governments with highly specialized long term shelters.
 
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