1) Astronomy 2) Uranology 
The science concerned with all aspects of the motion of satellites, rockets, and spacecraft. It involves the practical application of celestial mechanics, astroballistics, propulsion theory, and allied fields.
[n] - the branch of astronomy that studies the motion of natural and artificial bodies in space
astrodynamics Other 'star' units: aster-, sidero-, stell-.
noun the branch of astronomy that studies the motion of natural and artificial bodies in space
the science dealing with the paths of space vehicles.