Since observers in different parts of Earth will be observing the moon at slightly different angles relative to its (choose reference vector: north pole, origin of latitude longitude position, whatever), they will be observing very slightly different faces of the moon.

I tried looking online to see if anyone had examples of photos of the moon taken from different parts of Earth at the same time but got overwhelmed of photos showing that the moon appears "upside down" in the southern hemisphere relative to what a northern observer would expect and couldn't find any.

Does anyone have or know where to find an example of what I'm asking? Please note that I am not asking about the "upside down" moon effect I just described, and neither am I asking about lunar libration: I am specifically asking about being able to observe slightly different faces of the moon simply by standing somewhere else on Earth as someone else at the same time.

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    $\begingroup$ It's a tiny difference. Earth and Moon are much, MUCH further away that what most people imagine. Assuming two observers at the North and South pole, respectively, which is the absolute extreme case, the angular difference in how they see the Moon is less than 2 degrees of arc. $\endgroup$ Jan 11, 2019 at 23:21
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    $\begingroup$ @FlorinAndrei, tiny indeed, but I'm still interested. $\endgroup$ Jan 12, 2019 at 2:08
  • $\begingroup$ @Joshua re-reading your question I see you made that clearer than I first realized. I've deleted my comments. It's a great question! $\endgroup$
    – uhoh
    Jan 12, 2019 at 4:23
  • $\begingroup$ A little searching found images of the Moon from Australia. $\endgroup$
    – badjohn
    Jan 12, 2019 at 11:01
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    $\begingroup$ This is a bit of a cheat but if you use Virtual Moon Atlas (free download) you can change your viewing location and see the difference it makes. $\endgroup$
    – Dr Chuck
    Jan 12, 2019 at 13:12


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