Across
- 6. formed when massive stars collapse
- 9. form of matter only in neutron stars
Down
- 1. supermassive explosion that occurs when 2 neutron stars collide
- 2. works against gravity within the star
- 3. determines if a supernova causes a black hole or a neutron star
- 4. approx. 100 billion times stronger than on Earth
- 5. extremely rare type of neutron star
- 7. first planet found outside the solar system orbited around this
- 8. where all stars begin their life