There are 88 constellations in modern astronomy that were officially defined in 1922 by the International Astronomical Union (IAU). Most of the northern constellations in use today were based on those listed thousands of years ago by the ancient Babylonians and later the Greeks (Ptolemy). Of course, much of the southern sky remained unmapped until European explorers proposed new constellations for that region, as well as ones to fill gaps between traditional constellations. Inevitably, some proposed constellations didn't make the cut. These include Quadrans (which is now part of Boötes and Draco) and Argo Navis. The latter ancient constellation was so big that it was broken up into 4 smaller constellations, namely Carina, Puppis, Vela and Pyxis.

The Modern 88 Constellations

1. Andromeda...............Andromeda Constellation Guide
2. Antlia
3. Apus
4. Aquarius
5. Aquila
6. Ara
7. Aries........................Aries Constellation Guide
8. Auriga
9. Boötes
10. Caelum
11. Camelopardalis
12. Cancer
13. Canes Venatici
14. Canis Major
15. Canis Minor
16. Capricornus
17. Carina
18. Cassiopeia.................Cassiopeia Constellation Guide
19. Centaurus
20. Cepheus
21. Cetus
22. Chamaeleon
23. Circinus
24. Columba
25. Coma Berenices
26. Corona Austrina
27. Corona Borealis
28. Corvus
29. Crater
30. Crux..........................Crux Constellation Guide
31. Cygnus
32. Delphinus
33. Dorado
34. Draco
35. Equuleus
36. Eridanus
37. Fornax
38. Gemini.......................Gemini Constellation Guide
39. Grus
40. Hercules....................Hercules Constellation Guide
41. Horologium
42. Hydra
43. Hydrus
44. Indus
45. Lacerta
46. Leo
47. Leo Minor
48. Lepus
49. Libra
50. Lupus
51. Lynx
52. Lyra
53. Mensa
54. Microscopium
55. Monoceros
56. Musca
57. Norma
58. Octans
59. Ophiuchus
60. Orion........................Orion Constellation Guide
61. Pavo
62. Pegasus
63. Perseus
64. Phoenix
65. Pictor
66. Pisces
67. Piscis Austrinus
68. Puppis
69. Pyxis
70. Reticulum
71. Sagitta
72. Sagittarius
73. Scorpius
74. Sculptor
75. Scutum
76. Serpens
77. Sextans
78. Taurus
79. Telescopium
80. Triangulum
81. Triangulum Australe
82. Tucana
83. Ursa Major...................Ursa Major Constellation Guide
84. Ursa Minor...................Ursa Minor Constellation Guide
85. Vela
86. Virgo
87. Volans
88. Vulpecula....................Vulpecula Constellation Guide