Lunar libration in Petavius

Contains: Solar system body or event

Lunar libration in Petavius

The quality of the photos above left to be desired , but that is not what matters to our case.

Both photos were taken with an interval of 17 days, the photo on the left on the 19th of December was taken with the waning moon and the sun was setting in Petavius . The right photo was taken today , January 5 , the Sun was born two days ago in Petavius .

But this is not what matters , what really matters is the evidence of the movement of libration of the Moon

Look carefully at the two pictures. The left clearly seems to have been taken at lower angle , as if it had been made oblique , right now looks like it was taken from a higher angle , above .

And this is really true and is due to hold its Moon libration movement .

The event is due to the libration not perfect synchronization of the movement of rotation and

Moon revolution that allows us to see around 9 % of the lunar surface ( the boundary zone of the hidden face ) opposite the Earth , which is invisible when observing the Moon from our position on earth . The libration is due to displacement ( sway ) , real or apparent , of the lunar axes in relation to their average positions .

Therefore this '' staggering '' Moon allows us to see 59 % of its superfícieem certain times. These moments of maximum libration libration that alternate between North, South , East and West , is in latitude or in longitude , offers us an interesting opportunity to make comments and pictures of these lunar regions still unknown to most of us and also explains the because the crater exemplified above in one of the photos is more oval ( December) while the other is more circular ( January) .

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Lunar libration in Petavius

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