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EXERCISE 14
(a) Invert the value of the Hubble constant calculated in Exercise 12 above. What is the age of the universe (the "Hubble time") as predicted by Hubble and Humason's results? (b) Now invert the value of the Hubble constant calculated in Exercise 13. What is the Hubble time predicted by these modern results? (c) If you did the problems correctly, Hubble and Humason's results are very different from the modern results. Why, if their numbers were so far off, do we still credit Edwin Hubble and his collaborators for the discovery of the expansion of the universe? This is actually a pretty important point when it comes to the process of scientific discovery, so think about it... |