Well we hope.
We’ll need a element that isn’t to heavy and strong; My best guess would be Titanium or and alloy of Titanium very strong and light weight built in space to avoid Earths gravitational pull. I believe the main engine will be nuclear with Ion busters humor me; The Ion busters will work on collecting natural hydrogen and helium from space saving weight on the ship so it can go faster. We’ll Need a new computer system that can control the entire ship and as small as a desktop with relay as small as a I phone once again to save on weigh of the ship. The Ion busters will take it out of orbit so when they fire up the nuclear main engine it won’t drop Iodine and Strontium into the atmosphere and those that do will be burned up before they can hit the ground poisoning life.
The crew should be at least 3 couples in suspended animation chambers until the arrive; samples of human life also stored on board to clone into babies of every race known on planet Earth. We can only hope that the planet or moon will have had analysis and will support human life; And if there are creatures that live on this planet or moon will accept us and not call us invaders. My hope is that they are human like we are and we get along together; If they are more primitive then we are we will be able to teach them what we have learned the hard way so they can avoid some of pit falls that we already fell in. but if they are more advanced then we are I hope they will teach us and we learn together and have a bright future on this new world. We should put disc’s of our planet Earth a complete history of where we came from and up to the minute we departed Earth; And let’s hope that we learned from pollution and over population save them from the dangers that we Have here on Earth now
The Earth seen from Apollo 17. (Photo credit: Wikipedia)