The Nezu colony was a Delta Quadrant planet bombarded by asteroids in 2373, where Tuvok and Neelix rode a damaged orbital tether carriage to escape with evidence of an invasion plot.
The colony is the setting of the third-season episode Rise. Voyager tries to help the Nezu by destroying incoming asteroids, but they fragment oddly and rain debris on the surface. Away teams go down to find a missing astrophysicist, Dr Vatm.
Tuvok and Neelix's shuttle crashes near an orbital tether, a mag-lev lift running up a cable to space. Neelix, exaggerating his engineering experience, gets the carriage moving with Vatm, the Nezu official Sklar and two others aboard.
Vatm is poisoned on the way up. On the roof Tuvok finds a data device proving the asteroids are artificial, sent by the Etanian Order to force an evacuation. Sklar, their agent, is defeated, and Voyager drives off the Etanians.