Good point. Why isn't there a Moose constellation? And another thing - who gets to name those things anyway? Why can't I (or any other living thing) draw up a sky-chart with my own darn names of things. First to go - Andromeda. Never liked the name, never will.
Some of the constellation names go back to the ancient Greeks, but they couldn't see the stars in the extreme south. A few hundred years ago some European astronomers traveled to the southern hemisphere and invented new constellations for the stars near the celestial south pole, including a bunch of dumb names like Microscopium (Microscope), Telescopium (Telescope), and Antlia (Air Pump). Not only is there no Moose constellation, but there's also no Squirrel.