Here we go again?

Discussion in 'Blazers OT Forum' started by Denny Crane, Feb 22, 2013.

  1. Denny Crane

    Denny Crane It's not even loaded! Staff Member Administrator

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    http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/

    One explanation for dark energy is that it is a property of space. Albert Einstein was the first person to realize that empty space is not nothing. Space has amazing properties, many of which are just beginning to be understood. The first property that Einstein discovered is that it is possible for more space to come into existence. Then one version of Einstein's gravity theory, the version that contains a cosmological constant, makes a second prediction: "empty space" can possess its own energy. Because this energy is a property of space itself, it would not be diluted as space expands. As more space comes into existence, more of this energy-of-space would appear. As a result, this form of energy would cause the Universe to expand faster and faster. Unfortunately, no one understands why the cosmological constant should even be there, much less why it would have exactly the right value to cause the observed acceleration of the Universe.

    Another explanation for how space acquires energy comes from the quantum theory of matter. In this theory, "empty space" is actually full of temporary ("virtual") particles that continually form and then disappear. But when physicists tried to calculate how much energy this would give empty space, the answer came out wrong - wrong by a lot. The number came out 10120 times too big. That's a 1 with 120 zeros after it. It's hard to get an answer that bad. So the mystery continues.

    Another explanation for dark energy is that it is a new kind of dynamical energy fluid or field, something that fills all of space but something whose effect on the expansion of the Universe is the opposite of that of matter and normal energy. Some theorists have named this "quintessence," after the fifth element of the Greek philosophers. But, if quintessence is the answer, we still don't know what it is like, what it interacts with, or why it exists. So the mystery continues.

    A last possibility is that Einstein's theory of gravity is not correct. That would not only affect the expansion of the Universe, but it would also affect the way that normal matter in galaxies and clusters of galaxies behaved. This fact would provide a way to decide if the solution to the dark energy problem is a new gravity theory or not: we could observe how galaxies come together in clusters. But if it does turn out that a new theory of gravity is needed, what kind of theory would it be? How could it correctly describe the motion of the bodies in the Solar System, as Einstein's theory is known to do, and still give us the different prediction for the Universe that we need? There are candidate theories, but none are compelling. So the mystery continues.

    The thing that is needed to decide between dark energy possibilities - a property of space, a new dynamic fluid, or a new theory of gravity - is more data, better data.
     
  2. SlyPokerDog

    SlyPokerDog Woof! Staff Member Administrator

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    NASA?

    I don't believe anything the government says.
     
  3. Denny Crane

    Denny Crane It's not even loaded! Staff Member Administrator

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    I'm waiting for GOD to post. He's the authority on everything.

    By definition.
     
  4. jlprk

    jlprk The ESPN mod is insane.

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    With a descriptive title, this thread would get billions and billions of replies.

    [video=youtube;1YTYvji3gXU]https://www.youtube.com/watch?v=1YTYvji3gXU[/video]
     
  5. magnifier661

    magnifier661 B-A-N-A-N-A-S!

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    So which theory do you believe in? There was at least 4 explained, with all questioning the explanation.
     
  6. jlprk

    jlprk The ESPN mod is insane.

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    It's the first theory. Nothingness has many properties. Empty space is our perception of how all the dimensions intersect. There is great energy above, in the Higher Dimensions, but all we see is boring empty space. Someday science will tap the energy.
     
  7. Eastoff

    Eastoff But it was a beginning.

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    So is JLPRK Denny Crane or what?
     
  8. crowTrobot

    crowTrobot die comcast

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    Denny if you're trying to pick a fight with the Cosmological Argument it is based on the philosophical concept of nothing existing, not on empty space.
     
  9. crowTrobot

    crowTrobot die comcast

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    Dude you sound crazier than theists on this topic. That's not easy to do.
     
  10. magnifier661

    magnifier661 B-A-N-A-N-A-S!

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    Crowtrobot, you nailed it. That would only be a debate on semantics.
     
  11. SlyPokerDog

    SlyPokerDog Woof! Staff Member Administrator

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    This thread is from Feb of 2013.
     
  12. Denny Crane

    Denny Crane It's not even loaded! Staff Member Administrator

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    CrowTrobot, you nailed it.
     
  13. magnifier661

    magnifier661 B-A-N-A-N-A-S!

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    Does that give Denny a pass?
     
  14. SlyPokerDog

    SlyPokerDog Woof! Staff Member Administrator

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    He's on medication now.
     
  15. magnifier661

    magnifier661 B-A-N-A-N-A-S!

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    Hahahahaha
     
  16. BoomChakaLaka

    BoomChakaLaka Well-Known Member

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    Use the Force, Luke!

    No I better understand
     
  17. MarAzul

    MarAzul LongShip

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    Heh heh!
     
  18. oldmangrouch

    oldmangrouch persona non grata

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    That is not dead which can eternal lie
    and with strange eons even death may die
    Cthulhu Fhtagan!
     
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