Are there more atoms on planet Earth or stars in the sky?
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Atoms on Earth, by quite a long way. By our best estimate there are about 10^24 stars in the universe. That's actually rather close to Avogadro's Number, the number of atoms in one gram of hydrogen (more or less). read more
But more likely, there are 5 to 10 times more stars than there are grains of sand on all the world’s beaches. So, there’s your answer, Sheldon. For some “back of the napkin” math we can guess that there are more stars in our Universe than there are grains of sand on all the beaches of Earth. read more
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Are There More Grains of Sand Than Stars?
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