Across
- 3. The study of Space.
- 4. Move on a circle in a central axis.
- 6. The force that attracts a body towards the center of the Earth.
- 7. The regularly repeated elliptical course of a celestial object or spacecraft about a star or planet.
- 8. The third planet from the Sun and the only planet known to harbor life.
Down
- 1. The study of movements and relative positions of celestial objects.
- 2. An artificial body placed in orbit around the Earth or another planet in order to collect information or for communication.
- 5. Move or cause to move in a circle round an axis or center.