Morb Prime was a planet in the Morb System. It was considered the first planet, but its position varied greatly following its slow orbit.
The planet's strange orbit focused around the star Morb II. One part of the eliptical path brought Morb Prime between the two suns. This melted the whole surface, but the orbit would then take it about as far out as the fourth or fifth planet in the system. That allowed the lava to cool, so the surface alternated between black and red, depending on its phase.
Some scientists had a theory that the Morb sun shared Morb Prime's gravitational attraction with an outside star. Around 17 ABY, the New Republic attempted to set up mobile mining bases to work during the cool part of the orbit. However, the project was soon abandoned.