If you learn a great deal about celestial mechanics, you will become more significant. Solve the ephemeris problem. That's Step 1. Learn to determine orbits by the method of Gauss. That's Step 2. Learn how to calculate transfer orbits, both elliptical and hyperbolic. That's Step 3. After a while, if someone gives you a telescope, a star atlas, a computer and a spaceship, you can find where you want to go, figure out its orbit, and find the delta-vees necessary for getting there. Such a thrill.