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Featured Terms

  1. gibbous
  2. nadir
  3. nebulous
  4. penumbra
  5. retrograde
  6. sidereal
  7. syzygy
  8. wane
  9. wax
  10. zenith

ASTRONOMY

All Terms

  1. outer space
  2. p
  3. parallactic
  4. parallax
  5. parhelic circle
  6. parhelion
  7. parsec
  8. pc
  9. Pegasus
  10. penumbra
  11. perigee
  12. perihelion
  13. perilune
  14. Perseid
  15. Perseus
  16. perturb
  17. perturbation
  18. photomosaic
  19. photopolarimeter
  20. photosphere
  21. physical science
  22. pier
  23. Pisces
  24. plage
  25. planet
  26. planetarium
  27. planetary
  28. planetary nebula
  29. planetary science
  30. planetesimal
  31. planetesimal hypothesis
  32. planetoid
  33. planetology
  34. planetwide
  35. planisphere
  36. Pleiad
  37. Pleiades
  38. PLSS
  39. Pluto
  40. pointer
  41. Polaris
  42. pole
  43. polestar
  44. poleward
  45. Pollux
  46. precess
  47. precession
  48. precession of the equinoxes
  49. primary
  50. primeval