Best Minecraft Modpack availabe for you guys

Galacticraft 1.12.2 (Moon, Spaceship, Space Stations) is a minecraft mod that allows you to explore dungeons, fly to other worlds, and collaborate with your friends to build space stations.

With the GalactiCraft mod, you may work on rocket launch technologies and other related projects, such as manufacturing rocket materials, extracting energy, and creating machinery to help you live. Space is a hostile environment. The original GalactiCraft is packed with technology to aid you and the two planets you may explore, the moon and Mars, and if you become bored, you can install addons that support dozens of game actions. crystals of many kinds Forge Mod Loader, MicdoodleCore, GalactiCraft Planets, and Minecraft version 1.12.2 are required for GalactiCraft.

source: Galacticraft

RLCraft, stands for RL standing for Real Life or Realism is another take on a different mod called RLcoop. RLCraft is created for adventure, survival, RPG and immersion. It has many different scripts that works with vanilla behavior. 

If you love challenging more adventurous Minecraft then RLCraft is your friend. This ain’t your Dad’s Minecraft. By integrating RLCraft you are going to die a lot, just be prepared for it  

source: Rlcraft