Planets! Some came from (modifications of) free tutorials at https://www.youtube.com/playlist?list=PLsGl9GczcgBs6TtApKKK-L_0Nm6fovNPk while others I made from scratch (using knowledge from the Blender Material Nodes course).
In order, they are: moonlike, water world, cloud world (venuslike), generic rocky planet, ice world (like Europa), Jovian World, Lava Planet (like Io), Marslike, Mercurylike, Jovian world with rings (Saturnlike).
Edit: forgot to add the Earthlike (water world was close, though). Added.