Results 1 to 14 of 14

Thread: Life about 10 billion years from now

  1. #1
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    1,081

    Life about 10 billion years from now

    https://arxiv.org/abs/1806.07170

    Securing Fuel for Our Frigid Cosmic Future

    Abraham Loeb
    (Submitted on 19 Jun 2018)

    Advanced civilizations will likely migrate into rich clusters of galaxies, which host the largest reservoirs of matter bound by gravity against the accelerated cosmic expansion.
    There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
    Mark Twain, Life on the Mississippi (1883)

  2. #2
    Join Date
    Feb 2006
    Posts
    486
    I noticed two statements by the author which could do with some expansion:

    In addition, it would be beneficial for us to reside in the company of as many alien civilizations as possible with whom we could share technology, for the same reason that animals feel empowered by congregating in large herds.
    My understanding is that herds are collections of herbivores and are one way which has evolved to help protect against predation. While our descendants might differ from us, I tend to suspect that our own grouping would more likely be considered to be in the latter category; i.e. as a predatory pack instead of an herbivorous herd. Our local cluster is quite small, so (taking the proposal at face value) our descendants would have to go elsewhere.

    Some lucky civilizations were born in clusters and inherited the resources around them without the need to travel. Could others develop the technology that would enable them to reach the nearest galaxy cluster fast enough?
    In other words, those already there are likely to object strenuously to newcomers trying to make use of their resources. But see my comment above.
    Selden

  3. #3
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    1,081
    https://arxiv.org/abs/0811.4052

    The search for a strategy for mankind to survive the solar Red Giant catastrophe

    M. Taube, W. Seifritz
    (Submitted on 25 Nov 2008)

    In around 5 gigayears our Sun will grow to a Red Giant and will swallow Earth. The plan is subdivided into two parts: We propose to construct some kind of parasol to shadow Earth. The position of the parasol will be the (inner) Lagrange Point L1. If we want to survive also the time beyond the next 5 Gy, where Suns luminosity and radius increase hundred fold and oscillate until our Sun develops finally into a White Dwarf, we have to shift Earth into the Kuiper Belt (50 AU) by means of the swing-by technique During this journey of about some megayears or more Earth must be illuminated by an artificial light source. A ring of DD-fusion power stations outstretched on Moons orbit should produce the necessary 175 PW of visible light. In the Kuiper Belt Earth will be brought into an orbit of an artificial Sun, an ArtSun formed in the meantime by the fusion of gaseous Jupiter-like planets imported from other planetary systems in the neighborhood .
    There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
    Mark Twain, Life on the Mississippi (1883)

  4. #4
    Join Date
    Apr 2007
    Location
    Nowhere (middle)
    Posts
    35,309
    Quote Originally Posted by Roger E. Moore View Post
    During this journey of about some megayears or more Earth must be illuminated by an artificial light source. A ring of DD-fusion power stations outstretched on Moons orbit should produce the necessary 175 PW of visible light. In the Kuiper Belt Earth will be brought into an orbit of an artificial Sun, an ArtSun formed in the meantime by the fusion of gaseous Jupiter-like planets imported from other planetary systems in the neighborhood .
    If we have mastered artificial lighting/heating, why would another Sun be needed?
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  5. #5
    Join Date
    Sep 2004
    Location
    South Carolina
    Posts
    1,081
    Quote Originally Posted by Noclevername View Post
    If we have mastered artificial lighting/heating, why would another Sun be needed?
    Ah.... um.... I have a lot of work to do, but I'll get back to that in a couple of years. Promise.
    There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
    Mark Twain, Life on the Mississippi (1883)

  6. #6
    Join Date
    Feb 2006
    Posts
    486
    One possibility might be that the new sun could be used as a gravitational tug to transport its accompanying planets on a long journey to more accommodating environments, where more resources are available, perhaps. Therein lies some "hard" SF stories, perhaps. (Some such already have been written.)
    Selden

  7. #7
    Join Date
    Jun 2003
    Posts
    8,490
    On arrival the star could then be disassembled by starlifting. All these processes take billions of years. But a civilisation which colonises long-lived red dwarf systems will have a trillion years or more to play with.

  8. #8
    Join Date
    Feb 2006
    Posts
    486
    Unless they start throwing stars at one another....
    Selden

  9. #9
    Join Date
    Apr 2007
    Location
    Nowhere (middle)
    Posts
    35,309
    Quote Originally Posted by selden View Post
    Unless they start throwing stars at one another....
    At light years of distance and millions of years' travel time, you wouldn't even be aiming at the same species, let alone civilization, as the one you start to throw at.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  10. #10
    Join Date
    Nov 2009
    Posts
    315
    Quote Originally Posted by Roger E. Moore View Post
    https://arxiv.org/abs/0811.4052

    The search for a strategy for mankind to survive the solar Red Giant catastrophe

    M. Taube, W. Seifritz
    (Submitted on 25 Nov 2008)

    In around 5 gigayears our Sun will grow to a Red Giant and will swallow Earth.
    Does anyone really think there will be humans, or humanoids, or anything resembling such animals in 5 gigayears?!
    I dont expect any wise learned entity in even a 100m years caring at all for anything about our plans for their future.

  11. #11
    Join Date
    Apr 2007
    Location
    Nowhere (middle)
    Posts
    35,309
    The only thing we could do right now that would possibly be of interest to our 5 or 10 billion years removed descendants, is wipe ourselves out so that they are not born.
    Last edited by Noclevername; 2018-Oct-09 at 11:28 PM.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  12. #12
    Join Date
    Apr 2005
    Posts
    2,327
    We don't have 5 billion years. The Earth will become uninhabitable (to all but thermophiles) long before that.

    Multicellular life will go extinct about 800 million years in the future apparently. Things will start to get difficult long before that.

  13. #13
    Join Date
    Apr 2007
    Location
    Nowhere (middle)
    Posts
    35,309
    Quote Originally Posted by kzb View Post
    We don't have 5 billion years. The Earth will become uninhabitable (to all but thermophiles) long before that.

    Multicellular life will go extinct about 800 million years in the future apparently. Things will start to get difficult long before that.
    Only 800 million years? We'd better hurry!


    Seriously, though, if we're not living and thriving off Earth long before then it'll be because we wiped ourselves out. And if our distant descendants (or creations) have expanded into the Universe by then, they'll probably have the capacity to do something about saving life on Earth. Gravity-drag the planet away over a few million years with close asteroid passes. Planetary sunshades, probably with their own civilizations living on them. Starlifting to relieve or delay the Solar expansion. etc.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

  14. #14
    Join Date
    May 2004
    Posts
    1,741
    Quote Originally Posted by Noclevername View Post
    Only 800 million years? We'd better hurry!


    Seriously, though, if we're not living and thriving off Earth long before then it'll be because we wiped ourselves out. And if our distant descendants (or creations) have expanded into the Universe by then, they'll probably have the capacity to do something about saving life on Earth. Gravity-drag the planet away over a few million years with close asteroid passes. Planetary sunshades, probably with their own civilizations living on them. Starlifting to relieve or delay the Solar expansion. etc.
    I consider the Orion's Arm scenario conservative. And they would probably be able to do this in 12,569 AD.
    SHARKS (crossed out) MONGEESE (sic) WITH FRICKIN' LASER BEAMS ATTACHED TO THEIR HEADS

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •