Atmospheric Scattering for Mobile

I'd like to recreate the following scene:



Inside unity but optimised for mobiles. This will essentially be a lobby for my top down shooter for the player to customise their ship before a mission however, I'm struggling to find anything on recreating the planet effect you see here. What is recommended? an animated texture perhaps? (I could easily create an animation of the background and have that just as an animated texture.

Or for better effect actual real time scattering as the transition between orbit and the level will have the ship fly toward the planet.

I don't have pro so doing this for mobile in free will be difficult but not impossible.

Thanks!

Euden