SpaceTimeSMP (doesnt work)

This is a Modpack related around tech and space 

The mod Advanced Rocketry is the main space mo. it allows you to custom build your rockets. you can go explore other planets or make a space station

there's also tech mods such as Rftools it allows your to make elevators or teleporters to bring you places there's a lot more then just those mods that enhance your experience these a mod called Lost city's 

that mod spawns in big abandoned city's you can rebuild them or make a base in there there's also a lot of dungeons there its pretty fun to explore you can get a lot of loot from it. have fun with the modpack you an basically do anything. (there's tinker construct try to make the strongest tool as a challenge if you get bored)