Primary:	Pentarus III
Class:	M
Diameter:	3,045 km
Mass:	34.823 SPU
Mean Surface Temperature:	55.7 °Celsius
Surface gravity:	0.78 g

Lambda Paz (also known as Pentarus 3B) was a moon of Pentarus III. Barely class M, its surface was a desert with an average temperature of 55 °Celsius. In 2367, the mining shuttle Nenebek, carrying Captain Jean-Luc Picard and Wesley Crusher to negotiations on Pentarus V, crash-landed on Lambda Paz after suffering a thruster failure.

Picard and Crusher, along with shuttle captain Dirgo, sought shelter in a nearby cave that contained a fountain of water. However, the water was protected by a force field and an energy sentry that first injured Picard, and then killed Dirgo when they attempted to access the water. Crusher eventually found a way to deactivate the fountain's defenses using a modified tricorder, sustaining Picard's life long enough for them to be rescued by the USS Enterprise-D. (TNG: "Final Mission")