| Earth | NOVAS-COM: Represents the "state" of the Earth at a given Terrestrial Julian date |
| Planet | NOVAS-COM: Provide characteristics of a solar system body |
| PositionVector | NOVAS-COM: PositionVector Class |
| Site | NOVAS-COM: Site Class |
| Star | NOVAS-COM: Star Class |
| VelocityVector | NOVAS-COM: VelocityVector Class |