I am not sure do i feel any "nebula" in it.
More like "Stranded on a lone asteroid".
You know, i imagine myself standing in a astro-suit on a one of these asterois. like that Little Prince from the book. Watching into endless space, counting stars. Observing passing comeths, space dust and sun, around which my little asteroid circles.
And yes, as the guy before me said: very calming and relaxing. But not TOO relaxing so it would make me feel sleepy. More like a "calm curiosity" if you catch my drift.
I like it, very nice and calming