Chain armor from Namebrand 16x by Hydrogenate
https://www.youtube.com/watch?v=F30nvtDmXpg

Sun by Aideck
https://www.planetminecraft.com/texture-pack/better-sun-and-moon-4350537/

moon from Mizuno 16x by Mizuno
https://resourcepack.net/mizunos-16-craft-resource-pack/