3 ms·
How did Eratosthenese synchronize the measurements? That seems like the biggest challenge: sync'ing two clocks and transporting one to a place 500 miles away wi
by demondemidi 3y ago
How did Eratosthenese synchronize the measurements? That seems like the biggest challenge: sync'ing two clocks and transporting one to a place 500 miles away without losing time? 2000 years ago?
- metacritic12 3y agoHe timed solar noon and travelled due north / south to avoid the time zone problem.
- anvandare 3y agoThe summer solstice ("the longest day of the year") is always the same date regardless of your latitude: June 20th/21st (in the northern hemisphere). And assuming Syene is on the same longitude as Alexandria[0], Syene's noon is Alexandria's noon. Alexandria: 31°11′51″N 29°53′33″E Syene: 24°05′20″N 32°53′59″E Tropic of Cancer: 23°26′10.4″ N [0] It isn't, which contributed to the measurement error, but close enough is good enough.