Wormhole physics (Stargate)

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As portrayed in the fictional universe of Stargate, wormhole physics is a field of study that describes the functioning of Stargates and wormholes. It was pioneered by Samantha Carter. In the episode "Upgrades", possessing super-human abilities Samantha Carter wrote an entire book on the subject, claiming she had been wanting to write it for a long time previously but had never been able to find the time as it was such an incredibly complex subject.

[edit] Known statements

A wormhole can only be maintained for 38 minutes (Under normal circumstances).
Matter less than three μm from the event horizon will not reintergrate through a wormhole.
Matter can only pass one way through a wormhole.
Energy can pass through in either direction.
Energy to maintain an established wormhole can come from either side.
Substantial gravitational force can pass through a wormhole from either side.
Although gate travel seems instant to the traveler, matter transmission between stargates in the same galaxy takes on average 0.3 seconds. ("Ripple Effect").
A large surge of energy to an active Stargate can cause the wormhole to jump from the recieving Stargate to the next nearest one in line. ("Solitudes").
An event horizon can be created in the stargate without a wormhole. ("48 Hours").
When traveling from one gate to another, solar flares can redirect the wormhole from a gate to the same gate in another time period. ("1969" and "2010").