Beta Gate

The Beta Gate was a second Stargate found on Earth in Antarctica. It was discovered accidentally by Colonel O'Neill and Captain Carter when an energy blast overloaded the Stargate on P4A-771, redirecting the wormhole from the Alpha Gate to the Beta Gate.

Once removed from Antarctica, it was taken to Area 51 and put in storage. After an accusation of an SG team stealing alien technology, Carter discovered the Beta Gate was being used. SG-1 traveled to Area 51 to verify it was still in storage. Apon inspection, they found it had been replaced with a plastic replica. The real Stargate was recovered and returned to Area 51.

It remained in storage until SG-1 beamed the Alpha Gate onto Thor's ship to escape before it was destroyed. The Beta Gate was unpacked and setup at SGC so SG-1 could return home. The SGC continued using this Stargate until Anubis destroyed it with the Stargate destroyer.