The Big Bang. Where do we come from, where are we going?. Goals. What’s the cosmological principle? Where did things begin? Where will things end? What’s the temperature of space?. Hubble’s Law. Recall: All galaxies are moving away from us. The farther away the faster they go.
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Where do we come from, where are we going?
Every line of sight should end at the surface of a star.
time = distance / velocity
velocity = Ho x distance
time = distance / (Ho x distance)
time = 1/Ho
T ~ 15 billion years
10 x more energy in background than everywhere else.