Apparently all the galaxies are rotating faster than general relativity / newtonian mechanics predicts with the amount of matter we can see. This is a signature that those aliens are already moving them toward the center of the galaxy by gravity engineering. Dark matter is nothing but advanced alien technology that modifies gravity. Dark energy, on the other hand, is the same piece of alien technology that alien villains use to destroy developing civilizations.
Haha, that would be a hilarious outcome. The unexpected existence of Dark Energy turns out to be the signature of advanced civilization in the universe.
Sorry, I was talking off-topic, about traditional stationary Dyson spheres.
I think the answer to my question is some principle of thermodynamics. Something like “whenever an object is being heated faster than it is radiating heat away, its temperature will increase until the rate of radiating heat away equals the rate at which it is being heated”.
That makes sense to me if the sphere was a dumb ball of metal. But if it is full of machinery, well… why not like, uh, shoot some big lasers at the star, instead of emitting infrared into space?
Maybe I know the answer… Something along the lines of “there is a difference between the energy in your gas tank and the energy in a hot hunk of metal”… But, why? Steam engines convert heat to work just fine. …I guess you gotta condense the steam back into liquid, and one obvious way to do that is …wait for it… to radiate infrared into space!
Has anybody ever heard of a Dyson sphere that doesn’t radiate anything, ie, it is cold on the outside?
Apparently all the galaxies are rotating faster than general relativity / newtonian mechanics predicts with the amount of matter we can see. This is a signature that those aliens are already moving them toward the center of the galaxy by gravity engineering. Dark matter is nothing but advanced alien technology that modifies gravity. Dark energy, on the other hand, is the same piece of alien technology that alien villains use to destroy developing civilizations.
Earth? Mostly harmless.
Haha, that would be a hilarious outcome. The unexpected existence of Dark Energy turns out to be the signature of advanced civilization in the universe.
Serious question: Why does the Dyson Sphere concept apparently require emitting ‘waste heat’? Why not beam it back on the star you’re enveloping?
That’s what’s happening in this paper. The “waste” is being magically converted into thrust somehow.
Yes, correct.
Sorry, I was talking off-topic, about traditional stationary Dyson spheres.
I think the answer to my question is some principle of thermodynamics. Something like “whenever an object is being heated faster than it is radiating heat away, its temperature will increase until the rate of radiating heat away equals the rate at which it is being heated”.
That makes sense to me if the sphere was a dumb ball of metal. But if it is full of machinery, well… why not like, uh, shoot some big lasers at the star, instead of emitting infrared into space?
Maybe I know the answer… Something along the lines of “there is a difference between the energy in your gas tank and the energy in a hot hunk of metal”… But, why? Steam engines convert heat to work just fine. …I guess you gotta condense the steam back into liquid, and one obvious way to do that is …wait for it… to radiate infrared into space!
Has anybody ever heard of a Dyson sphere that doesn’t radiate anything, ie, it is cold on the outside?