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Please help me understand this about gravity

  1. Feb 2, 2012 #1
    What do they mean by this: "Albert Einstein's concept of gravity is wrong, and gravity becomes repulsive instead of attractive when acting at great distances."

    I found it here: http://www.jpl.nasa.gov/news/news.cfm?release=2011-149
    in the second paragraph.

    could anyone explain this with examples, if possible, please thanks!
     
  2. jcsd
  3. Feb 2, 2012 #2

    HallsofIvy

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    They state that this is an alternate theory, different from Einstein's theory of gravity from general relativity. And notice that, in the sentence just before, they state that the evidence gained contradicts that alternate theory.
     
  4. Feb 2, 2012 #3
    Your question is really about cosmological expansion caused by negative pressure...not GRAVITY....traditional gravity is a separate entity. Empty space has no gravity, but does have negative pressure!!!

    The paper also says this:

    So what is being said is that the force IS in accord with Einstein's concept of a cosmological 'constant' and the force is 'constant' as Einstein proposed.

    Wikipedia explains:

    http://en.wikipedia.org/wiki/Dark_energy#Negative_pressure
     
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