Sunday, 12 January 2014

Last night’s Moon

11 January 2014 The Moon

I’ve marked the Mare Humboltarium – it can only be seen from Earth when the moon’s orbital oscillations (officially called libration) allows us to see it. We can see around 59% of the Moons total surface from Earth (but only 50% at any one time!!).  This little animation shows what is going on:

File-Lunar_libration_with_phase_Oct_2007_450px

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