Across
- 1. lacking definite form or limits eight
- 3. an empty space in the cosmos four
- 4. a stellar explosion eight
- 7. all existing matter and space eight
- 11. a person who travels into space nine
- 13. a highly magnetized rotating neutron star six
- 14. energy emitted in the form of waves nine
Down
- 1. a star showing a sudden large increase in brightness four
- 2. relating to the universe six
- 5. a very rarefied and highly elastic substance five
- 6. the galaxy containing our solar system eight
- 8. a planet outside our solar system nine
- 9. a distant celestial object emitting large amounts of energy six
- 10. depressions on a celestial body's surface seven
- 12. a circle of twelve 30° divisions of celestial longitude six