Wow.....

                                                           upgrading my new spaceship now....
               Sims 4 has gotten more "interesting"..... Built my own "Spaceship"....!!!!!!!!!!!!

                         You begin building the "base" structure (off three-stage construct)

                                                 Adding till Rocket is complete....

                     Then found out it allows for the adding on of Ship "upgrades"...!!!!!!!!!

Already completed "expansions"  of  Cargo-Hold and Fuel Storage..... adding Weapon System now..
                   A "Thruster" And Landing Gear are the only other "Upgrades" to add
the Sim responsible for this "Feat" , had to  reach 5th level Mechanical to work on it and has studied up to 8th level Astronautical Science as well to "prepare".... My First Sim is Space... have "No idea" What to "expect".... worked on this since last night.... finally nearing "Completion" !!!