What we see in the sky is history?

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Saint, Oct 21, 2014.

  1. Billy T Use Sugar Cane Alcohol car Fuel Valued Senior Member

    Messages:
    23,198
    Out of my field of real knowledge, but think the "dark energy" is sort of making "negative gravity" repelling or pushing things apart.
     
  2. Google AdSense Guest Advertisement



    to hide all adverts.
  3. paddoboy Valued Senior Member

    Messages:
    27,543

    Something inherent in spacetime, of which we know naught about. Hence why we call it DE.
    Einstein's Cosmological Constant is a contender, but like I said, we do not know.
     
  4. Google AdSense Guest Advertisement



    to hide all adverts.
  5. Saint Valued Senior Member

    Messages:
    4,752
    Could it be the "hands of God"?
    Divine power?

    Please Register or Log in to view the hidden image!

     
  6. Google AdSense Guest Advertisement



    to hide all adverts.
  7. Captain Kremmen All aboard, me Hearties! Valued Senior Member

    Messages:
    12,738
    It is the space which is expanding, not the objects moving.
    I don't know whether the expansion of space requires energy.
    My guess is yes.
    All normal change requires energy.
    Is the changing of space an exception?
    Perhaps.
    Good question.
     
    precious likes this.
  8. nebel

    Messages:
    2,469
    in an expanding universe, messages are send into the future, but are received as coming from the past. so
    you can imagine you are ahead of everybody, but they have secrets you don't know (yet).
     
  9. Saint Valued Senior Member

    Messages:
    4,752
    dark energy expands the space-time.
     
  10. danshawen Valued Senior Member

    Messages:
    3,951
    The only force we actually know for certain that is capable of accelerating masses as large as the visible universe is gravity.

    Other types of forces, "quintessence" (a 'fifth' fundamental force) has been posited as the reason for acceleration of the fringes of our visible universe by "dark energy".

    Wild speculation about whether the universe we can see is the interior of a collapsed hyper massive black hole exist (Lee Smolin, others), but are largely ignored by more Ptolemaic cosmologists who are apparently more concerned about speculating on a universe in which there is a omnipotent creator who is interested in the minutiae of our personal spiritual lives. For that to happen, there must evidently be a universe that has a center of attention, because the human race is just too ADHD otherwise, and we were created in his image. Black hole theories are bad, because then G would be stuck in here with us, and also be unable, as we would be, to get out (he / she / it is omnipotent and omniscient) you see? I don't either.

    The "cold spot" in the Southern hemisphere of the Planck telescope data for the CMB could be the inside view of the annihilation fountain of an immense black hole. Gamma ray bursts at cosmological distances could be collisions of matter with the interior of an event horizon. But pay no attention. All of this is sheer speculation and guesswork. Not like mainstream cosmology at all.

    So, yes, it could be divine power. And why not? Even Newton though it was a divine hand that guided something as stupid as a stone to fall toward the exact dead geometric center of the Earth, and without a compass, a straightedge, or a mathematician to aid the process.

    My humble apologies if any of the former sounded sarcastic. He / She / big G would strike me dead for less.
     
    Last edited: Dec 20, 2014
  11. nebel

    Messages:
    2,469
    dark energy accelerates the expansion. dark energy is a property of the void, and as the universe expands, the amount of dark energy in it increases. and
    when you think of curved space, any movement in it would generate a kind of 'centrifugal' force powering the expansion. but
    why would the expansion not simply be inertia left over from the initial impetus, 'gift' of energy?
     
  12. nebel

    Messages:
    2,469
    dan, Do you think gravity could really 'power' an expansion? is it not the energy that we put into our satellite launches, the velocity in their orbits that OPPOSES gravity? Would not gravity alone never have allowed the universe to expand, and without expansion, no present, no 'now'- no past,- no history to contemplate? and
    as to the 'big G' question, if there is a creator, could he not have been just fine outside the Big Bang singularity 'before' the expansion/ inflation ?, so,
    why would he have to huddle in black holes now?
    just because the ancient religious writers got the past history all wrong, gave the creation report a bad reputation, does it mean we should reject the current true science 'readers' of the Universe's history too?
     
  13. nebel

    Messages:
    2,469
    saint, what we see is photon, - light from these far away and past events, you might call them 'fossils cast in radiation'. The beauty is, that they are in real time, they arrive here the moment they left,* -may be stretched because of the Universe's expansion,
    dimmed by dust, bend by gravity lensing, but good as new otherwise.
    history you can trust. fossils are fabulous.
    *at 'c', they have not moved through their time.
     
  14. Boris2 Valued Senior Member

    Messages:
    1,106
    Is this even possible? I thought there was only one direction withing a BH? Also if there is an event horizon then doesn't that infer that there is space outside that horizon?
     

Share This Page