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No public IJR answers mention Hipparchus yet. As people ask about it and share their answers, they'll appear here.
Not who you're looking for? Others named Hipparchus: crater on Mars · tyrant of Athens from c. 528 BC to 514 BC · cavalry officer in ancient Greece · dialogue attributed to Plato
“I have composed a book on the length of the year in which I show that the tropical year contains 365 days plus a fraction of a day which is not exactly 1/4 days as the mathematicians-astronomers suppose, but which is less than 1/4 by about 1/300.”
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