It is only in fairly recent years that the idea ofsending an object to another planet has become apractical reality. This has led to the rapiddevelopment of celestial mechanics, although thesubject is by no means new. The purpose of the paperis to introduce the subject and to see howwell-established results and equations may beutilised to find out about the motion of an objecton its way to another planet. Once the path isdetermined, various deductions may be made about therocket vehicle which must place the object orspacecraft along that path.

The concept at “launch window” will be introduced and amethod of determining it will be presented. Once itis known, the number of available trajectories(although theoretically infinite) are narrowed downby selecting desired values of some parameters.