It was perfect. He didn't have to move or break his gaze, he could stay up there and share it with his friend too. Castiel himself felt like a solar system with his feelings the planets, the star done out. Without the glue to hold them together and ordered they were scattering and he was always grabbing at them, trying to keep them from spinning off into space.
It had gotten a lot harder since his trip away, his centre shaken again. He was raw and tense and his laying on the roof was as much an act of desperation as nostalgia. He was struggling to accept anything good, joy burned him. He wanted to push it away. He tried not to think about why but he knew. He understood.
He wasn't thinking about David or anything else but the ancient black. He was hungry from a break from it all very different from the one he just had. Cas signed. "I could but you have your own names for them. As for what they looked like... it's hard to describe. Smaller, colourful, connected. I don't remember the very beginning but I remember when they were new. I think you would have liked them," he finished softly.