Across
- 7. a person trained to travel in space
- 10. existing or traveling between stars
- 11. a place where trees are cultivated and studied
- 12. a fossilized or petrified tree
Down
- 1. a flowering shrub with large clusters of flowers
- 2. the rigid outer layer of Earth, made of rock
- 3. a very large stone used in ancient structures
- 4. a scientist who studies stars and space
- 5. turned to stone; extremely frightened
- 6. to change into a star or constellation
- 8. having the nature of or resembling trees
- 9. oil found beneath Earth's surface