Ready for nonsense numbers? Here we go… > Since the Universe has been expanding for 13.8 billion years, the comoving distance (radius) is now about 46.6 billion light years. Thus, volume (43πr^3) equals 3. read more
That means that the observable universe, if filled with sand, would take approximately 3.58 x 10^89 grains of sand. That is 358,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 grains of sand. read more