1. Why couldn’t atomic nuclei exist when the age of the universe was less than 2 minutes? 2. Why…

1. Why couldn’t atomic nuclei exist when the age of the universe was less than 2 minutes? 2. Why are measurements of the present density of the universe important? 3. How does the inflationary universe theory resolve the flatness problem? How does it resolve the horizon problem? 4. If the Hubble constant were really 100 instead of 70 km/s/Mpc, much of what astronomers understand about the evolution of stars and star clusters would have to be wrong. Explain why. (Hint: What would the age of the universe be?)  

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