Point of origin

The point of origin is a symbol neccessary for Stargate addresses. While the first six symbols represent constellations indicating a point in space, the seventh tells the Stargate where the wormhole is coming from.

For years, Earth's point of origin was unknown, as the Egyptians had placed two figures praying by the symbol of the pyramid. Daniel Jackson eventually recognized the mistake, and the Tau'ri were able to link to Abydos. After arriving on Abydos, Jackson had difficulty locating the planet's symbol, but eventually found it.

As part of a personal preference, when the point of origin hits the seventh chevron, Walter Harriman will announce "chevron seven locked", as a way to change things up.