What would Physics have to say about such extravagant alien skies?

No.13434056 ViewReplyOriginalReport
another example that drew my eye:
https://www.pixelstalk.net/wp-content/uploads/2016/08/Beautiful-Alien-Planet-Wallpaper.jpg
Doing some world building for me book. Wanted to explore the possibility of a very different and perhaps more majestic sky. I suspect it would be a rare artist that consults astronomers before paining such images, but if one did, I wonder what the verdict would be.

Any resources out there that looked at the question - 'if the sky looks like this from planet's surface, what does that tell us about conditions on that surface'?

Specific points of interest
>Large planets or large moons visible with naked eye from surface - 5%+ of the sky
>Can a planet have its own asteroid belt that would be visible from surface
>Multiple suns, different colored suns
>Multiple moons but retaining earth-like climate and conditions
>Galaxies and nebulas visible with naked eye
>Planet with a larger surface area but same gravity on the surface? (perhaps hollow, or just less dense core?)
Perhaps most pertinent
If a scientist was picking making a new planet, wanted best view of the sky but still habitable world - what choices would he make?