Lunar Libration
Taken by Meiying Lee on September 13, 2021 @
Taipei, Taiwan and Phoenix, Arizona, USA
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Details:
Lunar Libration video link : https://www.youtube.com/watch?v=kE9PIhCSrH8 .
Because the moon's orbit around the earth is not a perfect circle and the earth rotates, there will be real or visually very slow oscillations when observing the moon on the ground, which is called Lunar Libration. Through these slight oscillations, we can observe more than 50% of the lunar surface. However, it is difficult to directly detect the slight wobble of the Moon surface by observing the Moon daily, so we make a continuous animation of the moon surface taken every day within a month, so that we can see the moon phase changes and obvious Lunar Libration.
From August 15th to September 13th last year, I took pictures of the moon for a month. So I started planning to make a one-month Lunar Libration video. Libration motion video production was referenced to the 2021 moon phases data on NASA's website. Individual photos were adjusted so that the viewing angles are identical to the simulated moon phases on the website, and the corresponding orbital locations were downloaded to aid the visualization. Finally, the complete photo set was made into animated video in order to show the moon phase change as well as the libration effect.
Photographer's website:
https://www.facebook.com/meiying.lee.98/
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