That look's awesome, looks like it's from the game. Perhaps the UI design task could have the community participate and those with the chosen contributions/art assets would be featured in the credits, something like UI design/Web community .
I'm not a great artist but I have an idea:
I was thinking of a few planets, a couple with rings and several moons, with one moon being impacted by a meteor and two colliding galaxies in the background. A new icon logo replacing the ring planet for Universe Sandbox could be one showing a star evolving then exploding with a more dark blue to black background, with the background change symbolizing a transition from the atmosphere to space(We are now at a greater elevation
). Though all in all showcasing some new features in the illustrations.