Problema Solution
Physicists estimate that the number of stars in th euniverse has an order of magnitude of 10^21. The number of stars in the Milky Way galaxy is around 100 billion. Using orders of magnitude, how many times as many stars are there in the universe as the Milky Way?
Answer provided by our tutors
1 billion = 10^9
100 billion = 10^11
since 10^21/10^11 = 10^10
there are 10^10 as many start in the Universe as in the Milky Way.