advanced_rocketry.zip is a release file of the Minecraft resource pack Advanced Rocketry/NuclearCraft Unification, made for Minecraft 1.12.2. It was published on January 9, 2020 and is 0.3 MB in size. For the full description, screenshots and every other version, visit the Advanced Rocketry/NuclearCraft Unification resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.