Why is space so dark even though the Universe is filled with stars?
This age old question has been dubbed Olbers’ paradox. Credit: John Colosimo/ESO “Why is space so dark even though the Universe is filled with stars?” — Nikhil, age 15, New Dehli People have been asking why space is dark despite being filled with stars for so long that this question has a special name – …
How many stars are there in the Universe?
“Exactly how many stars are in space?” — MeeSong, Brookline Massachusetts Look up at the sky on a clear night, and you’ll see thousands of stars – about 6,000 or so. But that’s only a tiny fraction of all the stars out there. The rest are too far away for us to see them. The …