| 单词 | measure longitude |
| 释义 | measure longitude The demand for portable clocks came during the 15th century from sailors who wanted to measure longitude. Times, Sunday Times More than 100,000 was eventually dispensed to clockmakers and astronomers who were able to measure longitude accurately. Times, Sunday Times However, as it was not possible at the time to correctly measure longitude, the exact boundary was disputed by the two countries until 1777. Retrieved from Wikipedia CC BY-SA 3.0 It covers the chronometer's history from the earliest attempts to measure longitude while including detailed discussions and illustrations of the various mechanisms and their inventors. Retrieved from Wikipedia CC BY-SA 3.0 He also devised a method for measuring longitude, based on eclipses. Retrieved from Wikipedia CC BY-SA 3.0 |
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