There are more stars in the observable universe than there are grains of sand on all the beaches on Earth. To put this in perspective, recent estimates suggest that the number of stars in the observable universe is approximately 100 billion to 200 billion galaxies, each containing between 100 billion and a trillion stars. If we take an average of 200 billion stars per galaxy and multiply by the number of galaxies, it is estimated that there are about 20 sextillion stars (or 2 x 10^22 stars)...