Astronomy Crossword Puzzle

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Across
  1. 2. A dark spot on the Sun's surface due to magnetic activity. (Sunspot)Chapter 9
  2. 3. Jupiter and Saturn's strong magnetic fields in the solar system. (Magnetosphere)Chapter 7
  3. 5. A rapidly rotating neutron star emitting regular electromagnetic beams. (Pulsar) Chapter 13
  4. 7. A bright, active galactic nucleus powered by a supermassive black hole. (Quasar)Chapter 15
  5. 8. The study of light separated into its component wavelengths. (Spectroscopy)Chapter 2
  6. 9. A planet orbiting a star outside our solar system. (Exoplanet)Chapter 4
  7. 13. Zone The region around a star where conditions may support life. (HabitableZone)Chapter 18
  8. 14. An early stage of a star, before nuclear fusion begins. (Protostar)Chapter 11
  9. 15. A type of variable star used as a distance indicator. (Cepheid)Chapter 14
  10. 18. A measure of how an orbit deviates from a perfect circle. (Eccentricity)Chapter 6
  11. 19. A sudden onset of helium fusion in a star's core. (Heliumflash) Chapter 12
Down
  1. 1. A technique combining signals from multiple telescopes for higher resolution. (Interferometry)Chapter 3
  2. 4. A large grouping of galaxy clusters and groups. (Supercluster)Chapter 16
  3. 6. The region around Earth influenced by its magnetic field. (Magnetosphere)Chapter 5
  4. 10. A model placing the Sun at the center with planets orbiting it. (Heliocentric)Chapter 1
  5. 11. Energy The mysterious force causing the accelerated expansion of the universe. (DarkEnergy) Chapter 17
  6. 12. Saturn's largest moon with a dense atmosphere and surface lakes. (Titan)Chapter 8
  7. 16. A method to measure star distances by observing position shifts. (Parallax)Chapter 10
  8. 17. A group of stars forming a recognizable pattern in the night sky. (Constellation)Chapter 0