The alien jump gate near the Ravine brings you to Omicron Iota; beware: there are Nomad weapon platforms and Nomad NPCs that can pack quite a punch. Using the same gate you emerged from in Iota, it'll take you to Dur, the big Nomad City. There are four Nomad gates before Dur that lead into the four colonies, but only Wild ID and K'Hara ID characters can use them. Other than these, all Nomad jump gates can be used by non-Nomads as well.