Subspace bubble
A subspace bubble was an encompassing energy field which could be used to protect objects or people from various environmental effects.

In 2371, an exploding microscopic singularity passing through the Sol system created a subspace bubble around the , isolating it from changes in the timeline inadvertently effected by three crewmembers who had traveled back in time to the year 2024. This allowed the Defiant crew to observe an alternate timeline in which Starfleet apparently did not exist and Alpha Centauri was under the control of the Romulan Star Empire. The timeline was later restored when the crew was able to ensure that events in the past unfolded as they did in the original timeline. ()

A subspace bubble could be formed around a person. This variation was used by Seska on a Kazon raider to bypass a force field, in order to retrieve a Federation replicator that she had traded in turn for a Kazon-Federation alliance. ()

See also
 Static warp shell
 Subspace isolation field
 Temporal wake
 Warp bubble

de:Subraumblase
es:Burbuja subespacial
fr:Bulle subspatiale
ja:亜空間バブル
bubble