It is suggested that for every grain of sand in the world there are a million stars.
How many grains of sand are there? Someone has tried to work it out:
"...mathematicians at the University of Hawaii tried to guess how many grains of sand are on the world's beaches. They came up with 7,500,000,000,000,000,000, or seven quintillion five quadrillion grains of sand."
How many grains of sand are there?
Here is some more evidence, a picture of a little bit of space:
Nebula IC 1396 in Cepheus