Across
- 5. an optical device for producing and observing a spectrum of light or radiation
- 8. small,airless rocky worlds that revolve around the sun and are too small to be called planets.
- 9. remote-controlled mechanical arm
- 10. stellar explosion that briefly outshines an entire galaxy
- 11. unit of length used informally to express astronomical distances
- 14. an array of telescopes or mirror segments acting together to probe structures with higher resolution
- 16. large and heavy or solid
Down
- 1. marking the longest and shortest days
- 2. icy small Solar System body
- 3. Global Positioning System
- 4. one way to create this environment is to travel away from Earth.
- 5. its held together by its own gravity
- 6. an example would be The Big Dipper
- 7. occurs twice a year, around 20 March and 22 September
- 12. natural phenomenon by which all physical bodies attract each other.
- 13. all stars, planets, and solar systems are formed from these
- 15. a meteorite when hits the Earths surface
- 17. the star that is the central body of the solar system