With Advanced Rocketry installed, Astral Sorcery constellations do not show up in the sky. This is with the following config changes:
#Whitelist of dimension ID's that will have special astral sorcery sky rendering skyRenderingEnabled = ["minecraft:overworld"] #If a dimension is listed here, the skyrender will only render constellations on top of the existing skybox. skyRenderingConstellations = ["minecraft:overworld"]

The skyRenderingConstellations does not seem to be functioning with Advanced Rocketry as of versions 1.13.8 (Astral Sorcery) and 2.0.0-10-universal (Advanced Rocketry).

Edit: Upon further testing, skyRenderingConstellations also does not seem to work with the Botania Garden of Glass skybox; this may be a wider modded skybox issue (Astral Sorcery overwrites GoG entirely, similar to Advanced Rocketry overwriting Astral Sorcery entirely). May be related to #1795

Curious, have you tried with "minecraft:overworld" in just the skyRenderingConstellations box and not the skyRenderingEnabled box?

I attempted that, and it did not appear to work. Fully turning off the Advanced Rocketry skybox seemed to work, on the other hand.

Shader fighting is unfortunately a thing that happens.