Dwayna's Heart is a star in the night sky above Tyria. It's the one star that never wavers or alters its place. By finding the altitude of that star—how high it is in the sky in relation to the horizon—you can tell if you are north or south of center (center being Arah).
- Dwayna's Heart seems to be the Guild Wars universe's equivalent of the North Star.
- As of 1220 AE, the astrolabe was used to determine latitude, with the sextant being in common use by 1229 to determine longitude based on the time difference from the central meridian in Rata Sum.