I'll tell you... I sure love the winter sky, but it sure is getting cold out here to stay out too long to view it. I love seeing Orion again and last night I was showing the kids the Andromeda galaxy. That is really cool. It's weird how you can see it with your naked eye, but you wonder if it's really there or not. I can see a little color, but it is so slight that you can't really focus on it. Then we got out the binoculars. They had a blast.
I did a quick search on your twinkling planets and it seems that they can actually twinkle, but it has to do with atmospheric conditions. Here is a link that you might find interesting... http://www.badastronomy.com/bitesize/twinkle.html
So, since we know that they can twinkle.... just pick out a few bright stars in your mural and call them planets. :-) I mean, you have the constellations, Milky Way and moon I believe (did I put in the moon?)... so why not a few planets.
Well, you have a great place to stargaze and these past few days have been great with very little moon.
I am either going to fly to California in the next day or two to paint... or I may drive drive. If I drive, I love to stop along the way in Southern Utah or also in parts of Nevada and California to stargaze. Not looking forward to the drive, but I am to the stargazing. Nothing like it. Then, next week I'll be out in New Jersey. I'll have to see how the two sides of the country differ.
Anyway, I found that article informative. I hope that it gives you a little more insite.
I still loved that sign you put up for me on your theater billboard! :-)