What would be on the spaceship.

The energy would be an important part. If you wanted to be reusable photovoltaic cells, also called solar panels. Also radioisotope thermoelectic generator which uses radiation as fuel. But another good fuel source is hydrogen and oxygen burner it takes water separates it and burns hydrogen and the pilots use the oxygen. DOUBLE efficient. You would also need to communicate to earth so, you would need a receiver, high-gain antenna, and transmitter. You would also need to have programs to help you get into space and down to earth. What you would use would be an spaceship clock also called a timer so, it would separate the engines at the right time. You want fault proof and you need RAM. You would need stabilization and control. You would need spin stabilization and Attitude and articulation control subsystem.
You would also need passive cooling and also cabin heating. You would need a heat shield and a parachute.
The most important part is the engines and also thrusters. This is the end of this post. "Spacecraft Systems." Spacecraft Systems. N.p., n.d. Web. 05 Feb. 2014.

NASA. NASA, n.d. Web. 04 Feb. 2014.