The following textures are from Astronomer's Visual Pack created by themaster401 and Asternomer, and thus follow the CC 4.0 BY-NC-SA license.

detail1
detailaurora
uvnoise1
particle_NRM
rgb
The following textures are from Stock Visual Enhancements created by Galileo, and thus follow the CC 4.0 BY-NC-SA license.
rgb3
The following textures are from The World Beyond created by TheProtagonist, and thus follow the CC 4.0 BY-NC-SA license.
earth_storm