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QUESTION
1. Calculate the size of the universe (in km), in two ways: a) rate of expansion (120 km/s) multiplied by time since the big bang (14 B yr). b) distance traveled by light between earth and
1. Calculate the size of the universe (in km), in two ways:
a) rate of expansion (120 km/s) multiplied by time since the big bang (14 B yr).
b) distance traveled by light between earth and the furthest star (45 B light yr),
where 1 light yr = 9.4 1012 km. Multiply by 2 for diameter
