Across
- 3. the science or practice of building or flying aircraft
- 8. events arranged in the order they occurred
- 11. a lookout station for observing the planets, stars, and weather
- 13. an object that orbits the Earth, Moon, or other planets to collect information or for communication
- 14. the layer of gases around the Earth
- 15. to release or send off
Down
- 1. someone who studies the objects in the sky, such as planets, galaxies, and stars
- 2. happening at the moment; most recent
- 4. making one feel very happy or excited
- 5. fixed or attached firmly so that it cannot be moved or lost
- 6. a repeating path that one object in space takes around another
- 7. craft a spacecraft that brings new supplies, food, or materials to astronauts
- 9. eye unaided by equipment such as glasses or a telescope
- 10. happening every three years
- 12. to make something appear larger than it is