If you ever get the chance go to the Royal Observatory in Greenwich, which has a great explanation of the difficulties (and values) associated with timekeeping:

If you ever get the chance go to the Royal Observatory in Greenwich, which has a great explanation of the difficulties (and values) associated with timekeeping: https://en.wikipedia.org/wiki/Royal_Observatory,_Greenwich#Observatory_museum https://en.wikipedia.org/wiki/Royal_Observatory,_Greenwich#O...