Across
- 2. A type of dwarf star
- 5. Area of dust and gas surrounding the nucleus of a comet
- 8. A comet hunter, remembered for his catalogue of DSOs
- 12. When one object moves in front of, and hides another
- 14. reflective property of a non-luminous surface
- 15. Constellation which features the sickle
- 18. The red planet
- 20. Developed the general theory of relativity
- 22. The demon star
- 23. Night time clouds best seen in the summer months
- 24. Planet which rotates once on its axis every 59 days
- 25. A galaxy with the alternative name of M31
- 27. A nebulae named after a crustacean
- 29. Icy cloud at the outermost limits of our solar system
- 30. a body that revolves around another body
- 31. Comet with a 75-76 year orbit (6)
- 33. The name of Patrick Moore's Selsey home
- 36. An object in the sky with a magnitude of about -27
- 37. Determines the light gathering potential of a telescope
- 38. Discovered in 1781
- 40. The opposite of zenith
- 41. Moon of Jupiter
Down
- 1. The northern hemisphere pole star
- 2. An exceptionally bright meteor
- 3. 3.2616 light years
- 4. Type of galactic arms
- 6. The Hunter
- 7. Explosion of hot gas from the surface of the sun
- 9. angular measure of the height of an object above the horizon
- 10. A Newtonian telescope requires this from time to time
- 11. common center of mass about which two or more bodies revolve
- 13. Where would you find maria, craters and rilles
- 16. An inferior planet
- 17. Have been identified orbiting distant stars
- 19. A belt of these reside between Mars and Jupiter
- 21. A cataclysmic explosion at the end of the life of some stars
- 26. The eye of Taurus
- 28. Group of stars, can be "open" or "globular"
- 32. there are 60 of these in one degree of arc
- 34. Comets commonly have two of these
- 35. Constellation featuring Castor and Pollux
- 39. The Dog Star