This Skybox took me "long" to make. SpaceEngine failed 7 times to export correctly, had to fiddle around in PS to rotate the images correctly and had to rename them again and again to align them properly in KSP.
Anyways, you are in the Nebula RN 8474-8300, which is a calm, blue Nebula in the Milky way. It was very hard to find in SpaceEngine without knowing its correct name.
It is a very "chill" Skybox, as the Nebula itself is quite feature-less. There are some Clusters and Dark Nebula's here are there tho.
I noticed that the header image is rather dim and boring. As written above, the Nebula itself is quite feature-less, but it still looks much better in the game than it does in the header.
Installation without CKAN:
As with any other Skybox, this needs TextureReplacer installed. It wont work without it!
1.) Download the mod
2.) extract the .zip
3.) open KSP directory and put the folder into the KSP folder
4.) click merge folders
5.) start KSP
7.) profit... yet again!
edited in PS; made it brighter. Even with SpaceEngines overexposure settings on 100%, it was still very dim.