Mesmerizing Moon
One year of the Moon in 2.5 minutes, by Universe Today Videos.
edit: included the link to Universe Today.
One year of the Moon in 2.5 minutes, by Universe Today Videos.
edit: included the link to Universe Today.
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I want cantaloupes. Thirteen cantaloupes, one after the other, and they should be round and very, very quiet.
That’s a good movie. Thanks very much.
I was surprised by the apparent rocking motion of the moon. I’d never noticed that before. Why does it appear that way? Is it just camera angles, or something else?
This is called ‘precession’. The usual analogy is to imagine a spinning top – while it spins about the rotational axis, the axis itself is undergoing rotation.
Just about every body in orbit around anything is undergoing at least one form of precession (there are multiple); hence the wobble in the facing of the moon.
@ AKron (below):
Chances are this is actually a compilation of detailed photographs, taken each night at the same hour from the same location. I doubt it is computer generated, aside from the video editing required to put a series of photos together in video form.
Thanks, @Holmes!
I’m just going to copy most of the text from Universe Today about this:
Thanks for taking the time to explain precession. I can visualise what is happening now.
How did they do that? Wait,. Animation. OK, I get it. Still it’s amazing. I shared it with friends.
Oh, way cool! Thanks for answering my question about precession before I asked it.