The bonosphere was a layer of gases and particles surrounding a planet.
When John Crichton tried to recreate the wormhole in Farscape-1, he did so in the upper bonosphere of Dam-Ba-Da, creating some unusual gravity waves which were detected on the surface. ("Till the Blood Runs Clear")
Talyn and Moya concealed themselves in the bonisphere of Kanvia in order to avoid the missiles being fired by Rinic Tolven. ("Thanks for Sharing")