Across
- 1. a vast collection of stars
- 6. how much an orbit differs from circular
- 8. light cannot escape it's gravity
- 10. average distance from the sun to earth
- 11. massive ball of gas
Down
- 2. distance light trvels in one year
- 3. a super massive black hole
- 4. the point in the sky that is directly overhead
- 5. device that supports telescope
- 7. a distinctive pattern of stars
- 9. edge of a celestial objects visible disk