Posted on 06/20/2018 8:29:23 AM PDT by Red Badger
Credit: CC0 Public Domain
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Dan Hooper, a senior scientist with Fermi National Accelerator Laboratory has written a paper outlining a way future aliens could keep their civilizations alive in spite of the isolation due to an expanding universe. In his paper uploaded to the arXiv preprint server, he suggests they might consider collecting and storing stars.
A Dyson sphere is a theoretical structure able to house a star. Originally proposed by Freeman Dyson, the sphere was originally envisioned as a group of satellites completely encompassing a star to capture all of its energy. That energy could then be used for whatever purposes the civilization that created it desired. In this new effort, Hooper suggests aliens might be creating similar structures to provide power once the universe expands to an untenable size.
Prior research has shown that the universe is not just expanding, it is picking up speed as it does so due to dark energy. This means that almost everything in the universe is being flung farther apart from everything else. Such a scenario suggests that galaxies will become increasingly isolated, though the components of the galaxies will remain bound by gravity. So, Hooper wonders, what would an alien race do to ensure it has a steady source of power? He suggests they might be collecting stars at this very moment, getting ready for the days ahead when they will be too far away to grab.
Hooper notes that such a scenario is still very far off—on the order of 100 billion years from now. But he also notes that if aliens were grabbing stars from one galaxy and transporting them back to another, the time for each trip would be on the order of billions of years. Thus, they would have to be doing it now, before they run out of time. He acknowledges that humans would probably not be able to understand the mechanics of moving a star, but muses on the possibility of an alien race powerful enough to do so. He further suggests that if such activity is currently happening, we might be able to see evidence of it by looking for stars that seem to be moving between galaxies—or by looking for holes in galaxies where stars have already been removed.
More information: Life Versus Dark Energy: How An Advanced Civilization Could Resist the Accelerating Expansion of the Universe, arXiv:1806.05203 [astro-ph.CO] arxiv.org/abs/1806.05203
Abstract The presence of dark energy in our universe is causing space to expand at an accelerating rate. As a result, over the next approximately 100 billion years, all stars residing beyond the Local Group will fall beyond the cosmic horizon and become not only unobservable, but entirely inaccessible, thus limiting how much energy could one day be extracted from them. Here, we consider the likely response of a highly advanced civilization to this situation. In particular, we argue that in order to maximize its access to useable energy, a sufficiently advanced civilization would chose to expand rapidly outward, build Dyson Spheres or similar structures around encountered stars, and use the energy that is harnessed to accelerate those stars away from the approaching horizon and toward the center of the civilization. We find that such efforts will be most effective for stars with masses in the range of M∼(0.2−1)M⊙, and could lead to the harvesting of stars within a region extending out to several tens of Mpc in radius, potentially increasing the total amount of energy that is available to a future civilization by a factor of several thousand. We also discuss the observable signatures of a civilization elsewhere in the universe that is currently in this state of stellar harvesting.
Journal reference: arXiv
Read more at: https://phys.org/news/2018-06-aliens-harness-stars-universe.html#jCp
Either way, it will kill you..................
This would make for some interesting Science Fiction.
If you have the technology to capture and transport a star, then you have the technology to produce all the energy you want anyway.
Aliens might be able to do it, but liberals would never go for us doing it.
Been done.
Contact............The book. The movie sucked. Missed the whole point of the book.............
Entropy will have its way....................
Assuming that the Universe is expanding, the aliens are expanding with it.
Assuming that the Universe is 14 billion years old, then any event that is expected to happen in 100 billion years is nothing but pure speculation, designed to get people to read articles.
If the Universe is expanding like the article implies, then eventually, after a very long time, a few trillion years, perhaps, Mars will be so far from Earth that we will not see the light from it.
Frankly, my dear, I don’t give a damn.
I’m wondering if aliens can do this, can they grow hair on my bald head?
"Can I buy some pot from you?"
The presence of dark energy in our universe is causing space to expand at an accelerating rate.
Humans first need to figure out how to move the Earth farther from the Sun as it heats up and expands.
If we could shoot the mass of Al Gore toward the Sun near the speed of light that would probably do it.
Not a sphere, but Ringworld is an interesting book about a ring, rather than a sphere.
Galactic Climate Change!!!
Only legal aliens should be able to. But, the left will want any aliens to have the option.
This will make for endless taxpayer funded research grants...
The article says that galaxies are moving apart but stars within the galaxies are staying together due to gravity. At least that is how I read it. There are 250 billion stars in the Milky Way. This articles says aliens would be 'fetching' stars in nearby galaxies before they run out of time. Any civilization advanced enough to do that could survive quite well by harvesting the resources they already have within their galaxy.
Our nearest galaxy is 2.5 million light years away. It is doubtful aliens or mankind ever travel outside their galaxy. The distances are just too great. There is no need for civilizations to travel much beyond their adjacent stars. It would be easier to terraform planets than to 'haul in' stars. :-)
Shirley this must be satire.
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