Black hole
From SGCommand
A black hole is a concentrated singularity of gravity which aborbs everything within it's reach, including light. Black holes cannot be seen, but the accretion disk, which is the flow of matter being pulled by the black hole, is visible. As one gets closer to a black hole, time appears to slow down, but since time is relative, it is only slow compared to those who are viewing it at a "normal" rate. (SG1: "Singularity")
While dialing P3W-451, the SGC was caught by a black hole consuming the planet. Unable to end the connection, Earth would be swallowed by the black hole. As they got closer, time slowed down, causing the SGC to lose contact with the rest of the outside world. The connection was broken when an explosive was placed just away from the Stargate, causing the wormhole to jump to another gate. (SG1: "A Matter of Time")
Supergates are powered by black holes, and this could mean that their wormholes could last indefinitely. (SG1: "Beachhead", "Camelot", "The Pegasus Project")
[edit] See also
- Black hole on Wikipedia
