You are welcome to thinking the universe is so small that you can grasp it. Belitteling it says more of you than I. Remember that part about the observable universe. That was also a premise, but you seemed to forget that.
Though I must admit I was a bit hasty myself. That is what I get for being less than vigilant with the headlines on my sources
*cough*
Still do not change that sandgrains on earth is a very finite number, whilst the size of the universe is still an unknown. And from what we do know, the universe is much bigger than the slice of it we can observe. And in that space alone, with the near infinite number of galaxies and corresponding stars, there is little doubt that the number of sandparticles on earth is dwarfed by the immensity in numbers of glowing fusionballs out there.