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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. Dog Star
  2. dolphin
  3. double star
  4. Draco
  5. dragon
  6. dwarf
  7. dwarf planet
  8. e
  9. earth
  10. earthlight
  11. earthrise
  12. earthshine
  13. eccentric
  14. eccentricity
  15. eclipse
  16. ecliptic
  17. el
  18. elev
  19. elevation
  20. elliptical galaxy
  21. elongation
  22. encounter
  23. endogenic
  24. entropy
  25. ephemeris
  26. ephemeris time
  27. epicycle
  28. epoch
  29. epochal
  30. equation of time
  31. equator
  32. equatorial
  33. equinoctial
  34. equinox
  35. Eris
  36. erratic
  37. escape velocity
  38. ET
  39. eucrite
  40. evening star
  41. event horizon
  42. exosphere
  43. extragalactic
  44. extrasolar
  45. extraterrestrial
  46. facula
  47. fall
  48. falling star
  49. farside
  50. fault