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David Callejas

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January 20, 2019

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Miguel Sala
Valencia, Spain

02/16/2022
10:57 pm

Photographer's Website

Equipment Details:

Mak127 Telescope
Camera Nikon D850

Post-processing Details:

Lightroom + Photoshop

Image Details:

Lunar Libration

We always see the same side of the moon because it takes the same time to rotate on itself as it does to go around the earth.
But although we always see the same face, we do not see exactly 50% of its surface, but 59%.
This is because when the moon is closer to the earth it speeds up, and when it is farther away it slows down, but it keeps the speed of rotation constant on itself.
This causes that from the Earth we perceive small oscillations in the face that it shows us, which is known as Lunar Libration.

Posted

January 20, 2019

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David Callejas

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About the Author:

David Callejas, Marketing Director, helps bring EarthSky's content to the world via online ads and other products. He creates strategies that help people around the world find us and appreciate the work we do. He helps manage the EarthSky Store and bring to you the new products that you love. He's the chief liaison between EarthSky.org and the world of commerce. All that, plus he helps post content and populate our pages on Facebook, Google+ and Twitter. Go David!