In 2368, a stellar core fragment from a collapsed neutron star passed through the Moab sector. The passing fragment, which had a density of one hundred billion kilograms per cubic centimeter, posed a serious threat to the colony: its mass would create large earthquakes, far beyond what the colony was designed to withstand. Because of this unique danger, the isolationist colony made a one-time exception to their policy against outside contact and accepted assistance from the USS Enterprise-D. (TNG: "The Masterpiece Society")
|Alpha Moab : I • II • III • IV • V • VI|
According to the script, the pronunciation for Moab was "MOH-ub". 
According to Star Trek: Star Charts ("United Federation of Planets I"), Moab IV (Genome Colony) was listed as a member planet of the Federation in 2378. The author, Geoffrey Mandel, incorrectly listed this planet as Moab VI.