Bajoran wormhole

The Bajoran wormhole is a fictional celestrial anomoly featured in the Star Trek television franchise. It was a principal setting used in the 1990s spin-off series Star Trek: Deep Space Nine and was first seen in the premiere episode of the series, "Emissary".

Descripion
The Bajoran wormhole was the only stable wormhole known to exist in the Milky Way Galaxy. It crossed some seventy thousand light years, with one terminus located in the Denorios belt of the Bajoran system in the Alpha Quadrant, and the other at a point near the Idran system in the Gamma Quadrant.

The wormhole was the home of extra-dimensional beings who were worshiped by the Bajorans as gods, known as the Prophets, and therefore was sometimes referred to as the Celestial Temple in that context. Kor, a Klingon, once called the wormhole the "Eye of Destiny". In the Gamma Quadrant, the wormhole is known as "the anomaly" by the Jem'Hadar, and to the Skrreea, according to their mythology, as the Eye of the Universe. The wormhole is also known to the Changelings as the "passageway".

It was theorized that the wormhole was formed by unique particles, called verterons, that were self-sustaining in nature. Highly elevated levels of neutrinos were also commonly detected prior to the appearance of the wormhole's event horizon, and as a vessel traversed the passage. It was believed that verteron nodes played a large part in keeping the wormhole stable.