Puzzle 49: Cosmic Phenomena (Nebulae, Pulsars)

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Across
  1. 2. – Highly magnetized, rotating neutron star emitting beams
  2. 6. – Hypothetical tunnel connecting distant points in space-time
  3. 7. – Shell of gas ejected by certain stars near the end of their life
  4. 10. – Extremely large black hole at the center of some galaxies
  5. 11. – Cloud of gas and dust in space
  6. 12. – Massive system of stars, gas, dust, and dark matter
Down
  1. 1. – Explosion of a dying massive star
  2. 3. – Icy body that develops a tail when near the Sun
  3. 4. – Dense remnant of a supernova composed of neutrons
  4. 5. – Region in space with gravity so strong nothing escapes
  5. 8. – Small rocky body orbiting the Sun
  6. 9. – Extremely luminous active galactic nucleus