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Post by Big Lin on Sept 27, 2011 23:40:42 GMT
From a blog I occasionally read by a strange but brilliant eccentric. . STUPID-PEOPLE ASTROPHYSICS! Now that a third person has asked, I guess I have to answer this:
>Faye, >what do you think about they discovered you can go faster than light after all
When an observation right on the edge of detectability indicates that something believed to be impossible contradicts every 21st-century experiment, you don't celebrate the overthrow of the foundation of physics, you say "well we know our measurements are inaccurate because we're measuring these things at a velocity exceeding c." Then you methodically look for the source of the signal noise that arose because you don't know the density of every single mass near a 450-mile line through the earth. ESPECIALLY if cars driving down the road will cause unacceptable perturbations.
It reminds me of "dark energy". If they're real far away, 1a supernovae luminosities are lower than we think they should be. But instead of saying "the signal is attenuated and we don't know why", they decide that the universe expansion is speeding up. And now, tachyons can exceed c.
No, they can't. And if you understand SR, you know WHY they can't. Particles that go faster than c appear to us to be moving slower than c, but backwards in time.
Non-autistics seem to be incapable of saying the three wisest words in English: "I don't know". Y'all MUST have an explanation, ANY explanation, even if you have to just make sh1t up and then go ahead and believe it, no matter how obviously ridiculous it is. (Like "it happened when an invisible space alien who looks exactly like a human used magic".)
I just thank god I didn't hear about this in USA Today or Faux news. The Post article only mentioned time travel and starships once.
I'll go to my fave astrophysics site, where I can get valid opinions from people who actually know what they're talking about.
One more thing: I apologize to any stupid people I offended. (You don't want to get them mad at you
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Post by toby on Oct 1, 2011 8:18:34 GMT
Toby comments.:- There are many things not answered, a couple.
1.)The Universe is expanding. What is it expanding into ?
2) The Universe is around 6 Billion years old, since the big bang, The Universe is around 56 Billion Light years across therefore if you look at the idea no faster than light', then the Universe cannot be larger than 6 Billion light years across.
It does seem certain that just after the big bang, the Universe Must have expanded faster than light, (which we are told is impossible).
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