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tullio

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Message 23969 - Posted: 11 Jun 2012, 7:11:59 UTC

On the CERN Bulletin page I've read that the Full Moon exerts a gravitational influence on the LHC 27 km track, so that the beam trajectory must be modified in order to maintain its precision. But the Full Moon means only that the whole Moon is visible by us. I believe that the Moon exerts an influence even when it is not visible. Is it so?
Tullio
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Zapped Sparky

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Message 23971 - Posted: 11 Jun 2012, 18:02:42 UTC

The headline is attention grabbing :) But I don't see how the amount of sunlight hitting the moon could have any effect on it.
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tullio

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Message 23973 - Posted: 12 Jun 2012, 2:22:47 UTC

In the Grotta Gigante near Trieste there is a horizontal pendulum capable of registering the Earth tides caused by the Moon.
Tullio
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Adak

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Message 23977 - Posted: 13 Jun 2012, 14:31:07 UTC - in response to Message 23973.  

The fullness of the moon isn't a factor. It's the movement of the moon that has an impact on the LHC. Same as the movement has an effect on the tides.

The article did state this, but in a rather odd way, since it included the term "full moon", before the word "movement". Read it again, and remove the word "full", and you'll understand what was meant.
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