Astral Tracking( Dragon Compendium)
You can follow tracks across the featureless wastes of the Astral Plane. In addition, you can try to determine the destination of a creature that has used a teleport spell or effect.
You can attempt to track a creature normally, even through the featureless wastes of the Astral Plane (base Survival DC 25). In addition, when standing at the location (on any plane) from which a creature departed by means of a teleportation spell or effect, you can determine its destination with a successful DC 30 Survival check. If you have your own means of teleportation, you can then teleport to that location as though you had viewed it once.