Constellations

[bjornnittmo]

I already asked this question of kumagoro, but I thought it was kind've interesting, so I thought I'd open it up to the floor...

If you could be an astronomical body (e.g. a particular star, constellation, nebula etc.) which one would you be?
And since kumagoro already answered (Cassiopeia!), she can pick a bonus one if she wants! :)