| ab2c | Calculate c in Focus (c, 0) |
| Arrow.pcs | Add arrows in Polar Coordinate System |
| Arrow3D | Plot 3D Arrow axis. 'Arrow3D' |
| d2r | Degree to Radian |
| FactSheet | This is data to be included in my package |
| Orbit.location | Calculate location of a planet 'Orbit.location' |
| orbit.parameter | Give the orbit the parameter |
| PCS2CCS | Convert Polar Coordinate System to Cartesian Coordinate System. |
| plotpcs | Plot in polar coordinate system |
| plotplanet | Plot a planet |
| r2d | Radian to degree |
| SpaceObject | Class of planet 'SpaceObject' |
| SpaceObject-class | Class of planet 'SpaceObject' |
| SpaceOrbit | Class of Orbit 'Orbit' |
| SpaceOrbit-class | Class of Orbit 'Orbit' |
| Status.planet | Calculate the status of planet 'Status.planet' |