Yeah, your right, it is done with Apophysis. I didn't save the parameters though so unfortunately I can't share the flame. But if you're curious, a similar look can be obtained by creating a random batch of flames using only the Spherical setting, and then browsing the results. If you're lucky enough, some of the flames might look a lot like the one I created.
Yes, it's also Apophysis created, but it's multiple renders that I combined in Photoshop, I was mostly hunting different colors that I was able to combine in Photoshop to create a decent nebula. I haven't saved any of the flames used, but the most important thing I was after was color. And also I did use the same "spherical" approach while browsing for usable flames. The planets was done in photoshop after creating the nebulae and stars. So my advice is just browsing what Apophysis is have to offer, the fractals created with it is a great base for any space-related scene.
Yeah, I've been creativily dead for too long, but some stock is something I have been able to produce. That and the upcoming cosmos-pack for resurgere, but that too will take a long while until it's done. I hope all is well in your life, and also I'm glad to see you produce more art, with any luck I'll catch up with you on my main-account once the time is right.