From "Galaxy-space 1.1.5 STABLE", If I'm installing this mod and use some shaders by Optifine, It will make Minecraft window be super dark, I can't even clearly see blocks and mobs, I'm updating my mod version, but the newest version(1.2.1 STABLE) haven't solve this problem.
GalaxySpace-1.2.1+STABLE.jar
MicdoodleCore-1.7-3.0.12.503.jar
Galacticraft-Planets-1.7-3.0.12.503.jar
GalacticraftCore-1.7-3.0.12.503.jar
preview-OptiFine_1.7.10_HD_U_E7_pre.jar

Disable Overworld Sky in config.

Wow, the problem was solved, thank you very much @BlesseNtumble