Neutron stars puzzle

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Across
  1. 3. Spinning star that sends out beams
  2. 4. Center of a star
  3. 8. Scientist who found the star mass limit
  4. 10. Energy that travels through space
  5. 12. Neutron star with a very strong magnetic field
  6. 13. Weird-shaped matter inside a neutron star (italian)
  7. 14. Force that pulls things together
  8. 15. When atoms join and make energy
Down
  1. 1. Type of high-energy light
  2. 2. Big explosion of a star
  3. 5. Quick release of energy
  4. 6. Strongest type of light energy
  5. 7. How packed together something is
  6. 9. Area around a star controlled by magnetism
  7. 11. Particle with no charge