# Thread: The Moon - what it has to offer and the best phase to view it

1. ## Re: The Moon - what it has to offer and the best phase to view it

Originally Posted by mental4astro
... a balance is found where the heavier side is drawn to the outside of the orbit, and this locks the oribit period into matching the rotational period. A centrifuge situation.
I always wondered how exactly this balance is found. If the Moon were perfectly rigid there would never be a tidal lock and the Moon would rotate on its own rate forever. Tidal locks only happen if the satellite is elastic. The deformation dissipates energy, which eventually causes the rotation relative to the larger body to stop. But then how can the angular momentum be maintained? Apparently this happens by moving the satellite further away from, or closer to, the larger body depending on whether the angular rotation is faster or slower than the orbital rotation. That way the angular rotation decreases or increases, thereby preserving angular momentum. The momentum of the larger body also changes by a small amount. I got this from https://en.wikipedia.org/wiki/Tidal_locking , thought I'd add this just in case I wasn't the only one left dangling.

2. ## The Following 2 Users Say Thank You to CamelHat For This Useful Post:

Eagleheaf (01-20-2018),ic_1101 (01-20-2018)

3. ## Re: The Moon - what it has to offer and the best phase to view it

What an amazing article
It gives brief information about the moon..
Thank you for sharing!!!

4. ## Re: The Moon - what it has to offer and the best phase to view it

Originally Posted by CamelHat
I always wondered how exactly this balance is found. If the Moon were perfectly rigid there would never be a tidal lock and the Moon would rotate on its own rate forever. Tidal locks only happen if the satellite is elastic. The deformation dissipates energy, which eventually causes the rotation relative to the larger body to stop. But then how can the angular momentum be maintained? Apparently this happens by moving the satellite further away from, or closer to, the larger body depending on whether the angular rotation is faster or slower than the orbital rotation. That way the angular rotation decreases or increases, thereby preserving angular momentum. The momentum of the larger body also changes by a small amount. I got this from https://en.wikipedia.org/wiki/Tidal_locking , thought I'd add this just in case I wasn't the only one left dangling.
Excellent expansion of the tidal lock explanation, Camelhat! Thank you so much for this!

Alex.

5. ## Re: The Moon - what it has to offer and the best phase to view it

Alex,
I've long admired your lunar sketches both here and on IIS. Really great to see so many of them in one really well composed article.
Joe

6. ## Re: The Moon - what it has to offer and the best phase to view it

Great article. Thanks.
Book marked

7. ## Re: The Moon - what it has to offer and the best phase to view it

I am not sure why I have not seen this before, Alex.

This is an outstanding post. I have copied it to my permanent archive.

I cannot thank you enough. :-)

8. ## Re: The Moon - what it has to offer and the best phase to view it

There is a free moon atlas you can download and look up the names of what you are viewing. I use it a lot, and it contains a wealth of info.
It can be configured in different ways. Try it to see if it helps you.

en:start [Virtual Moon Atlas]

Mike

9. ## Re: The Moon - what it has to offer and the best phase to view it

Yes, Virtual Moon Atlas is also listed at the end of the article! It really is a most extraordinary resource!

Thanks Mike for bringing it up again

Alex.

10. ## Re: The Moon - what it has to offer and the best phase to view it

wow very informative I think I'll look at the moon more often in the right phases

11. ## Re: The Moon - what it has to offer and the best phase to view it

wow very informative I think I'll look at the moon more often in the right phases
Remember, ALL phases are the RIGHT phase to view the Moon. Each phase has different features and shadow play in action. That is why the Full Moon is also the right phase, not the worst phase.

Alex.

12. ## The Following 2 Users Say Thank You to mental4astro For This Useful Post:

Eagleheaf (01-21-2018),TOTSUWA (03-19-2018)

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