but it took me until this month to grasp that it is not just the shape of the moon that changes! Its face changes too.

18th November 2021 – note position of Tycho (large crater) at bottom

The face we see in both hemispheres is always the near side of the moon, that’s because it takes about the same amount of time for the moon to rotate on its axis (27.3 days) as it does for the moon to make one revolution around Earth (29.5 days). Consequently we always see the same side.

In the north hemisphere the moon’s north is at the top, and in the southern hemisphere the south is on top when it reaches its highest point in the sky. That all made sense to me, however I hadn’t properly taken in, until Clare share this lovely post, that during a day in both hemispheres you may also observe slight variation in the angle. Look again at my photograph above, now look at the next two. Focus less on the moon’s shape and more on its craters and ‘seas’.

In the last two photographs Tycho, the big crater at bottom, is now to the left. I thought it so odd, bizarre even, that I had never noticed this before. Still my oddness is a great way for me to remind you all of February’s Square Challenge and its theme of ‘odd. We will be looking for square photographs whose subject matter is;

  • Differing from the usual or not happening often (ie oddballs, the exceptions and follies)
  • Separated from its set or mate (eg odds and ends or maybe odd socks or shoes)
  • Not divisible exactly by two (ie odd numbers) or the number is unknown (ie 30 odd birds)

Have fun exploring oddness and discovering oddities as the new year begins, and I look forward to seeing what you find when squares begins in February. And as it is a brand new year why not invite some of your blogging friends to join us, here’s the link to the theme image which you are welcome to download and share.

Happy New Year!

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