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> Astronomers expect that our sun will grow steadily brighter and, in about 7.6 billion years, may engulf the Earth Any proposition on how “fixing” sun energy

> Astronomers expect that our sun will grow steadily brighter and, in about 7.6 billion years, may engulf the Earth Any proposition on how “fixing” sun energy output will gratify my intellectual curiosity.

willio58 3y ago
Have you heard about Dyson spheres? https://en.m.wikipedia.org/wiki/Dyson_sphere https://en.m.wikipedia.org/wiki/Dyson_sphere Yes it sounds crazy but think 250 million years down the line
- xlance 3y ago
  Exactly. Or we will alter the Earth's orbit so that less of the energy reaches us.
  - kergonath 3y ago
    Where would we get the energy from to do that? The orders of magnitude don’t check by quite a few orders of magnitude.
    - bmacho 3y ago
      Push Jupiter into the Sun, and use that energy to escape with Earth
- kergonath 3y ago
  There are serious physical issues about Dyson spheres. Things like constellations of satellites orbiting a star are much more practical solutions than a solid sphere.
- aziaziazi 3y ago
  In my understanding Dyson spheres harvests energy but won’t stop stars expansion. Though peer commenter xlance propose to use that energy to changes earth orbit, which address the goal. But as far as I know building a Dyson sphere would also require a quantity of material resources that we don’t have on earth. Some options to get those: A. energy to mass, but we don’t know if that’s even theoretically achievable. Also it probably would require a Dyson sphere itself to have enough energy. B. convert other abundant elements (O, Si, Fe…) into required elements using known atomic reactions. But harvesting that much elements from earth could transform it in a state that does not worth the pain to try “saving” it.
undersuit 3y ago
If we remove mass from our sun we can extend it's life to some mind-numbing numbers. https://www.youtube.com/watch?v=pzuHxL5FD5U https://www.youtube.com/watch?v=pzuHxL5FD5U
jl6 3y ago
Space is big and interstellar travel is slow, but 7.6bn years is a long time, during which we should have become adept at hopping between desirable stars as they come and go.

willio58 3y ago

Have you heard about Dyson spheres? https://en.m.wikipedia.org/wiki/Dyson_sphere https://en.m.wikipedia.org/wiki/Dyson_sphere Yes it sounds crazy but think 250 million years down the line

xlance 3y ago
Exactly. Or we will alter the Earth's orbit so that less of the energy reaches us.
- kergonath 3y ago
  Where would we get the energy from to do that? The orders of magnitude don’t check by quite a few orders of magnitude.
  - bmacho 3y ago
    Push Jupiter into the Sun, and use that energy to escape with Earth
kergonath 3y ago
There are serious physical issues about Dyson spheres. Things like constellations of satellites orbiting a star are much more practical solutions than a solid sphere.
aziaziazi 3y ago
In my understanding Dyson spheres harvests energy but won’t stop stars expansion. Though peer commenter xlance propose to use that energy to changes earth orbit, which address the goal. But as far as I know building a Dyson sphere would also require a quantity of material resources that we don’t have on earth. Some options to get those: A. energy to mass, but we don’t know if that’s even theoretically achievable. Also it probably would require a Dyson sphere itself to have enough energy. B. convert other abundant elements (O, Si, Fe…) into required elements using known atomic reactions. But harvesting that much elements from earth could transform it in a state that does not worth the pain to try “saving” it.

undersuit 3y ago

If we remove mass from our sun we can extend it's life to some mind-numbing numbers. https://www.youtube.com/watch?v=pzuHxL5FD5U https://www.youtube.com/watch?v=pzuHxL5FD5U

jl6 3y ago

Space is big and interstellar travel is slow, but 7.6bn years is a long time, during which we should have become adept at hopping between desirable stars as they come and go.