Across
- 4. a type of radiation
- 5. nebula gas cloud
- 8. an extremely dense star.
- 9. the merging of two nuclei
- 12. the weight of something
- 16. Pulse of radiation
- 17. A tools for seeing how bright a star is.
- 20. a star that orbits the sun
- 21. a type of black hole with jet beams
- 23. a diagram
Down
- 1. The apparent magnitude of an object
- 2. A type of meteor
- 3. The milky way
- 6. an arrangement of stars
- 7. a type of dwarf star
- 10. a type of star
- 11. a dying star
- 13. bright star
- 14. a big hole
- 15. A tool for seeing far away stars
- 18. Makes strong magnetic field.
- 19. a property of matter
- 22. The force holding you to the earth.