Stargate power node

In the Pegasus galaxy, some Stargates have been placed in space in orbit of planets, rather than on their surfaces. Instead of using a connected DHD, Spacegates are powered by three power nodes, and dialing is accessed by a panel on a ship. Puddle Jumpers and Wraith Darts are the only known vessels equipped with such DHDs, and are among the few ships capable of actually going through this type of Stargate. (SGA: "Rising")

The power nodes also contain some kind of stabilizers to keep the gate in geosynchronous orbit of the planet, in case it is knocked out of position. They most likely recharge on the residual power of an incoming wormhole. (SGA: "Ghost in the Machine")

Spacegate 1 — A Spacegate is powered by three power nodes

v • ePower sources

Altairan power pack • Ancient crystal power cell • Ancient solar power collectors • Asgard power core • Aturen power cell • Battery • Cauldron • Cold fusion • Cold fusion reactor core • Containment chamber room • Eye of Apophis • Eye of Ba'al • Eye of Balor • Eye of Marduk • Eye of Osiris • Eye of Ra • Eye of Tiamat • Eyes of the Goa'uld • Fission generator • Fusion • Generator • Geothermal energy • Hou Kaingan pearl • Ki'ai power cell • Atlantis lightning rods • Liquid Naquadah • Atlantis main power conduits • Main power room • Mobile drilling platform • Naquadah cell • Naquadah generator • Naquadah reactor • Naquadria • Naquadria power cell • Naquadria reactor core • Neutrino-ion generator • Nuclear fusion reactor • Ori power generator • Pilation solar cell • Power Booster Device • Power distribution center • Project Arcturus • Repulsor-field generator • Section Seven • Solar power • Stargate power node • Subspace capacitor • Subterranean power grid • Telnorran generator • Terra-root • Tidal power generation station • Wind power • Zero point energy • Zero Point Module • ZPM Hub • ZPM room