Across
- 5. A long, narrow hilltop
- 7. A shoe made of rubber
- 8. A domed building to see projections of space.
- 9. metric unit of mass equal to 1000kg
- 10. A Russian astronaut.
- 13. A series of space flight and a Greek god
- 14. A layer of gases surrounding the earth
- 15. Basic or limited
Down
- 1. An important assignment
- 2. the eighth known Solar planet from the Sun.
- 3. A schedule to take place at a set time.
- 4. The action of exploring a new area
- 6. Process of discovering or being discovered.
- 11. A fixed luminous point in the night sky
- 12. An idea or opinion produced by thinking