Across
- 6. The envelope of gases surrounding a planet.
- 8. An object that orbits a planet or star.
- 9. To send settlers to a place to establish political control.
- 10. An unmanned exploratory spacecraft.
- 12. All existing matter and space considered as a whole.
- 13. The line at which the earth & surface and the sky appear to meet.
- 14. A group of stars forming a recognizable pattern.
Down
- 1. A room or building housing an astronomical telescope.
- 2. Relating to an orbit.
- 3. An important assignment for political or scientific purposes.
- 4. The emission of energy as electromagnetic waves.
- 5. To send a rocket or missile into the air or space.
- 7. An instrument used to make distant objects appear nearer.
- 9. Positioned in or relating to the sky or outer space.
- 11. A person trained to travel in a spacecraft.