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