How many galaxies in this Universe?
Average number of suns / galaxy?

I've seen a wide range of estimates for these numbers. Anybody know of a authoritative source?

Question

How many galaxies in this Universe?
Average number of suns / galaxy?

I've seen a wide range of estimates for these numbers. Anybody know of a authoritative source?

anonymous · Answer

number of galaxies in the observable universe = 1.7×10^11

anonymous · Answer

the milky way has (2×10^11 to 4×10^11) stars

anonymous · Answer

That if I counted them correctly last night

anonymous · Answer

Thanks Santistebanc, can you cite your source for that information?

anonymous · Answer

Well if it helps I can attest to the accuracy of his numbers. I would cite my astronomy textbook, but that wouldn't do you much good I feel.

anonymous · Answer

There is no exact way to calculate them......Coz our universe is always expanding.......A lot of stars are creating and destroying every second.....So study the univers......don't the stars of universe..........Ok.....

matthewrlee · Answer

An authoritative source? The data is always shifting.