Across
- 2. small incredibly dense ball of closely packed neutrons
- 5. gigantic explosion in which a high mass star throws its outer layer into space, but the core remains
- 6. the distance light travels in a year, make sure to include -
- 7. collection of large and small bodies that orbit one central star.
- 11. Spherical body that orbits a star.
- 12. measure of a stars brightness as seen from Earth
- 13. space and all the matter and energy in it
Down
- 1. large cloud of gas and dust
- 3. how bright a star would be if it were located at a standard distance
- 4. large collection of stars, gas, and dust that is held together by gravity
- 8. The star's actual brightness
- 9. hot dense core of matter that remains after the collapse of a low mass star
- 10. large celestial body that is composed of gas and emits light