Astronomy 10 12.4.06 - Astronomy 10 The Big Bang Continued...

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Astronomy 10 The Big Bang Continued 1/4/06 Hubble’s constant continually changed for years o Now agreed to be about 71 The physics assumption that all supernovae has the same brightness because they give out the same amount of energy is very questionable o They are very chaotic—> varies depending upon the angle that you look at it o The difference in brightness has been observed o In the history of science, every time a single observation that turns around an entire line of thought, that observation is flimsy because it is usually an initial measurement Either way, the Universes fate remains the same o Eventually, the last star will flicker out, there will be no more free energy, and life will freeze to death Expansion is speeding up o Thought to be because of dark energy o If the current measurements are right, 74% is dark energy, 4% is conventional matter, and the rest is unseen matter o Nothing is known about dark energy Possible for the universe to slow down o
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