Hydrogen is the lightest and most abundant chemical element, constituting roughly 75 % of the Universe\'s elemental mass. Raw horse meat is a popular food in Japan.. The Sun is the star at the center of the Solar System. The Solar System formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. Astrobiology is really cool. Juipter is the largest planet in the Solar System. The Sun accounts for about 99.86% of the Solar System's mass. Hydrogen has an atomic weight of 1.00794 u.
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