Monday 21 March 2011

Perigee-syzygy

There’s been a perigee-syzygy in Swanage this week; no not a Polish Folk Festival but an extreme supermoon.

Supermoon



Actually it’s a phenomenon across the globe, not just Swanage.

Now most people know that the moon causes our tides; I always thought this was something to do with the type of cheese the moon was made of, but apparently it’s something that clever chap Sir Isaac Newton invented, on 5th July 1687, it’s called gravity.

“Tides are periodic rises and falls of large bodies of water. Tides are caused by the gravitational interaction between the Earth and the Moon. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Since the earth is rotating while this is happening, two tides occur each day.”

So putting physics to one side.

 ….Swanage Lifeboat chap and Secret BBQ Chef Andy Lyons popped out and took some photos of the low tide in Swanage. He has very kindly allowed me to borrow them for the blog, thanks Andy.

Lots of reefs off Ocean Bay, and plenty of sand elsewhere.




Photos by Andy Lyons

The moon has also had some consequences for shipping in the Solent.

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