Verteron nodes, Playing god

Verteron nodes inside the Bajoran wormhole

A verteron node is a concentration of verteron particles, such as those which existed in great quantity inside the Bajoran wormhole.

In 2370, Jadzia Dax and Arjin, a Trill initiate who had been assigned Dax as his field docent, attempted to pilot a runabout through the wormhole in an attempt to return a rapidly-expanding protouniverse to the Gamma Quadrant, but experienced difficulty in that, every time they passed through a verteron node, the node interacted with the energy fluctuations of the protouniverse, causing a resonance leakage. Although they had attempted to use a powerful containment field to protect the protouniverse from verteron radiation, the attempt failed when the field began to degrade. This forced Arjin, who was a level-five pilot, to precision fly the runabout between the nodes, allowing them to safely return the protouniverse to the Gamma Quadrant. (DS9: "Playing God")