Why the expansion of the universe accelerates?

Discussion in 'Astronomy, Exobiology, & Cosmology' started by Peter2003, Apr 9, 2003.

  1. Peter2003 Registered Senior Member

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    Can anybody explain what is the observational evidence for accelerating expansion of the universe?
     
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  3. willson13 The Villiage Idiot Registered Senior Member

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    Actually, I saw a show on this last night, but I was simultaneously on the computer, so I didn't get all of it. Anyway, apparently they were studying supernovas as a "cosmic speedometer". I don't know how they do it, but all supernovas are pretty much the same brightness, so they figure out the distance, and the rate its brightness is decreasing, and figure out the speed of the expansion of the universe. Now they know that it's going faster than it previously was.
     
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  5. alice Registered Senior Member

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    yeah we need to learn more about dark matter and dark energy

    ... let's hope we can detect gravitons soon..and see a whole new exotic layer of our reality

    seems Einstein was right about his 'cosmological constant'....poor guy so far ahead in his thinking he was alone..and began to think it was the 'biggest blunder of his life"... i hope somehow his 'wave' parts flow on and see we are FINALLY understanding his wonderful thinking
     
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  7. (Q) Encephaloid Martini Valued Senior Member

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    Can anybody explain what is the observational evidence for accelerating expansion of the universe?

    From the brightness of distant supernovae.
     
  8. willson13 The Villiage Idiot Registered Senior Member

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    Thankyou for correcting me, Q. Suprenovae. Silly me...
     
  9. Prosoothus Registered Senior Member

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    willson13,

    Both "supernovas" and "supernovae" are correct.
     
  10. willson13 The Villiage Idiot Registered Senior Member

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    Really? They are? I had never heard supernovas used before, rather suprnovae. Well, I guess you learn something everyday. Thanks.
     

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