Are there obsolete constellations?
Over the centuries, some astronomers have attempted to name constellations after themselves or to flatter a patron or king. This reached a peak during the heyday of celestial mapping in the seventeenth and eighteenth centuries. Few of these survived longer than the astronomers who named them, although they sometimes can be seen in antique star charts. For example, in 1678, Edmond Halley (of Halley’s Comet fame) invented a constellation called Robur Carolinum, or Charles’ Oak, in honor of King Charles II of England. This constellation did not last long, especially after its rejection by the French astronomer Lacaille in his maps of the southern sky. In 1754, the English naturalist and noted satirist John Hall invented thirteen constellations based on rather unappealing animals such as a toad, a leech, a spider, an earthworm, and a slug. Fortunately, even though they may have been intended as a joke, they never caught on. At its first meeting in 1922, the International Astronomical Union
