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Physics, Astronomy & Cosmology / Re: Why are there two high tides a day?
« on: 10/12/2013 01:12:25 »
I think I understand now, so if I drew a perfect elipse representing the earths orbit around the Sun there would be a monthly ripple on the orbit towards and away from the sun every two weeks, does this effect show up in any other measurement say the earths gravity or astronomical measurement.