The trajectory of ballistic missile is 3: A. Powered flight: launch until thrust burnout. B. Free flight. C. Re entry: lasts until impact.

High performance rockets using the principle of "staging" made it

Observation is science, Research? mmm not sure.

The beauty in a RADAR lies in the fact that it is able to determine speed plus position.

If orbital motion is around the sun " easterly", then it it Direct. Otherwise it is Retrograde

Orbital Elements: 6 measures that describe size, shape, orientation of an orbit,and to pin pointing position of satellite @ certain time.

Each object in orbit belongs a "coordinate system".