It's probably your race's home planet. If you join a faction before placing your character's starting location, you should get at least one other choice (the faction's HQ building). There also used to be several additional locations (i.e. larger, more populated worlds known to most people, e.g. Coruscant, Corellia, Kuat), but i'm not sure if they're still general starting locations.
well, ive jumped in and alls good.
this whole choice (or lack thereof) of starting position thing should be mentioned somewhere for us noobs, i read through quite a bit of stuff but never saw it, anyhow alls well that ends well