Astral Plane

''"The Astral Plane is the space beyond space; the place you are when you aren't anywhere else. It is the final infinite frontier, within which the modern conjurers place their extradimensional spaces, and it is the gate through which we cross dimensions. It is everywhere, and it is nowhere; the ultimate pool of existences." -Toben the Otherworldly''

Overview
The Astral Plane is an infinite blue void of realmstream, filled with drifting cosmic gateways to anywhere that has ever existed. Small pockets of the Astral plane are used to create extradimensional spaces, such as with a bag of holding, and can be used to travel across physical distances or between worlds, such as with the Dimension Door or Plane Shift spells.

Though the Astral plane is used often by elite spellcasters for teleportation and extradimensional pockets, little is known about the Astral plane of existence itself. As of the current age, the Spaurian Mages Association still has not found a safe means of exploring the Astral plane, though it is easy enough to access. The chief problem with exploring the Astral is that it is pure cosmic vacuum, and after entering, a subject has no control over their physical body as it is swept away by the endless realmspace. Such a person or object can expect to be thrown into another plane of existence almost immediately upon entering.

Astral Projection Theory
The theoretical concept of Astral Projection involves sending a consciousness into the Astral plane without the attachment of a physical body or vessel, in order for them to explore and return with data. Toben the Otherworldly was the first to hypothesize that this could be done during his own in-depth research of the Astral plane and it's mechanics. Since his disappearance, independent arcanists of the Spaurian Mages Association have long tried to complete Toben's work by proving this hypothesis correct, but to this day, such projection of the soul has never been achieved.