It is only in fairly recent years that the idea of
sending an object to another planet has become a
practical reality. This has led to the rapid
development of celestial mechanics, although the
subject is by no means new. The purpose of the paper
is to introduce the subject and to see how
well-established results and equations may be
utilised to find out about the motion of an object
on its way to another planet. Once the path is
determined, various deductions may be made about the
rocket vehicle which must place the object or
spacecraft along that path.
The concept at “launch window” will be introduced and a
method of determining it will be presented. Once it
is known, the number of available trajectories
(although theoretically infinite) are narrowed down
by selecting desired values of some parameters.