Skylore Hercules was sent to kill Hydra, a sea monster which possessed the terrifying ability, whenever a head was cut off, to grow two heads in its place. The Hound's forerunner, in Greek named Prokyon. Description The largest and longest of the constellations, stretching from Cancer to Libra . Its brightest star is Alphard, with an orangish tint. The size of each star indicates its relative magnitude .
Constellation names are light blue .
Messier object numbers are pink . Globular clusters are gold starbursts . Open clusters are dotted white circles. Planetary nebula are green diamonds . Bright nebula are magenta squares .