Curiosity pills: there are more water molecules in one liter bottle than stars in the Universe.
A mole of water contains, by definition, 6.022x10²³ molecules and weight 18 grams so, approximately, in a 1-liter bottle there are around 3.34x10²⁵ molecules of water. Scientists estimated the whole universe contains between 10¹¹ to 10¹² galaxies, each made of 10¹¹ to 10¹² stars. that means there are between 10²² to 10²⁴ stars in the Universe.
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