Response to the resent rocket launch

Watching the SpaceX car launch has made me think a lot of things, especially about all of the planets and the rocket ships themselves. How long do the people have to study about the planets themselves to go to any planet on a rocket ship? I find it very fascinating that people have got the skills to actually get a rocket into orbit and into another atmosphere. How do people make the rocket? What material is best for building a rocket, and how long do engineers spend building these rockets? All of the people that made all of this possible have probably been spending all of their time, working on this amazing rocket and you could hear it in their cheers when the rocket was finally launched. This makes me wonder how much work actually goes into building this rocket.  All of these people have probably spent most of their spare time, on a computer or building the rocket. I think that regular people are now realising how much work is actually put into building rockets and launching them.