particles - How to create a Nebula in Cycles? - Blender Stack Exchange
Nebula Generator v1.3.0 [$] - BlenderNation
Creating a nebula in EEVEE (tutorial in comments) : r/blender
E-Cycles Render Engine Twitterissä: "E-Cycles Nebulae edition 2.82a is now available for Windows and Linux! It's now up to 30x faster than official Blender builds. Original Blend by @gleb_alexandrov https://t.co/HuWF3QPzsy" / Twitter
Free download: Blender Space Nebula Node Group - BlenderNation