General Question

rebbel's avatar

Why don't you we ever have a 100% full moon?

Asked by rebbel (35553points) August 26th, 2018

Whatever app I use, whichever online resource I frequent; the full moon of a certain date is always (as far as I can remember) given as being 99.9%.
What is the reason for this?
Thanks in advance!

Observing members: 0 Composing members: 0

7 Answers

ragingloli's avatar

Because, technically, a full moon only lasts for a Planck time.

ScienceChick's avatar

Here is an old article from Space.com from 2004 that explains it better than I could write it all out here for you. http://www.nbcnews.com/id/4402294/ns/technology_and_science-space/t/full-moon-merely-fallacy/

And here are some other cool things about the moon. https://www.space.com/11162-10-surprising-moon-facts-full-moons.html

MollyMcGuire's avatar

Sometimes you just have to settle. For me, when we have a full moon, it’s full enough.

kritiper's avatar

Because the mountains and valleys on the moon create shadows.

rebbel's avatar

Thanks, guys, and gals, for your insight!
@MollyMcGuire I am okay with 99.9, I love the moon in all its phases.

imrainmaker's avatar

I honestly won’t be able to differentiate between 100 and 99.9% so I’m ok with it..!!

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