Home Science Physics The Scale of the Universe SciencePhysics The Scale of the Universe Carl Sagan told us that there are more stars in the universe than there are grains of sand on all of the Earth's beaches. At the same time, there are more H2O molecules in just 10 drops of water than there are stars. By Watch and Study - Apr 15, 2017 620 RELATED ARTICLESMORE FROM AUTHOR History The Evolutionary Epic Biology Astrobiology & the Search for Alien Life Biology 3 World-Changing Biology Experiments Physics What’s in the darkest part of the sky? The Hubble Deep Field Physics What is Dark Matter? A Mystery of the Universe Tell us what you think!