it was discovered that the moon controls the tides in 2nd century bc.
it was discovered that the moon controls the tides in 2nd century bc.
when was it discovered that the moon controls the tides?
2nd century bc
theory of tides









































the theory of tides is the application of continuum mechanics to interpret and predict the tidal deformations of planetary and satellite bodies and their atmospheres and oceans (especially earth's oceans) under the gravitational loading of another astronomical body or bodies (especially the moon and sun).









































section::::history.









































section::::history.:kepler.









































in 1609 johannes kepler correctly suggested that the gravitation of the moon causes the tides, basing his argument upon ancient observations and correlations. the influence of the moon on tides was mentioned in ptolemy's "tetrabiblos" as having derived from ancient observation.









































section::::history.:galileo.
theory of tides
analog tide clocks are most accurate for use on the atlantic coasts of america and europe. this is because along the atlantic coastline the moon controls the tides predictably, ebbing and flowing on a regular (12- to 13-hour) schedule. however, in other parts of the world such as along the pacific coast, tides can be irregular. the pacific ocean is so vast that the moon cannot control the entire ocean at once. the result is that parts of the pacific coast can have 3 high tides a day. similarly, there are areas in the world like the gulf of mexico or the south china sea that have only one high tide a day. mechanical tide clocks used on the pacific coast must be adjusted frequently, often as much as weekly, and are not useful in diurnal areas (those with one tide per day).
tide clock