Astral Plane Geographic Location in Aetheus | World Anvil

Astral Plane

The Astral Plane, also known as the Astral Sea or the Silver Void, was one of the planes of existence in the cosmology of Aetheus. A bright silvery grey void, likened to a barren place of dimensional nothingness that extended in all directions endlessly.  

GEOGRAPHY


The Astral could be reached from almost any point in a Prime Material plane or first layer of any Outer plane by spell, psionic ability, or device. A barren place of other-dimensional nothingness extending in all directions. What little solid substance that floated in the bright, grey void was typically chunks of matter broken off from their original plane. The Astral had no gravity but objects did retain their mass so you could throw small items or push off from large objects to move in the weightless environment.   Time in the Astral flowed at the same rate on a Prime Material plane but the effects of time were slowed almost to a stop ― a thousand years in the Astral plane felt like only a day to the traveller.   Creatures did not go hungry or age while in the Astral plane. For that reason, its mortal inhabitants needed to return to the Material Plane in order to have children or to reach adulthood.   Entering the Astral plane could be accomplished in one of two ways: projecting your astral form into the plane via the astral projection spell, or by physically entering the plane.    Astral projection was the safest way to travel but still involved risk because you left your physical body behind on the traveller's plane of origin. The astral body would be accompanied by the astral forms of any items and clothing that were magical or radiated a magic aura. While projecting, your astral self was connected to your physical body by a silver cord that stretched out behind you for about 10 feet (3 meters), or 1 foot (30  centimetres) depending on the version of the spell, and then became invisible and intangible. Very few things could sever this silver cord: a powerful psychic wind, a githyanki silver sword, or the will of gods. The physical body left behind appeared alive but did not require food, water, or air and did not age. It could be moved and was vulnerable to damage and death. If the traveller's physical body was slain, death followed the projection some minutes later. If the astral self was slain, the traveller then returned to his or her physical body in a coma.   Physically entering the Astral plane required a spell such as plane shift and brought travellers wholly into the Astral with no silver cord to anchor them to their plane of origin.   GEOGRAPHICAL FEATURES   Upon entering the Astral plane, travellers saw a silvery colour pool nearby — a portal to the location on the Prime Material plane from which they originated. Astral projecting travellers saw their silver cord leading back to this pool. Colour pools appeared as two-dimensional circles about 10‒60 ft (3‒18 m) in diameter and were only visible from one side unless they had some way to detect invisible objects. Pools of different colours were portals to the different Outer planes. Each Outer plane had its own unique colour, but the traveller's home portal was always a metallic silver, rippling like mercury in a pan. Colour pools could be used to view the destination plane before stepping through by mentally concentrating on the nearby pool until it became transparent. A viewer could also move (with some limitations) the portal's viewpoint by concentration. Astral projecting travellers formed a new physical body (with a silver cord attached) when they stepped through a colour pool to their destination plane. The new body was formed out of local materials so the greater the similarity between one's home plane and the destination, the more one's new body looked like the original one.  

COSMOLOGY


Within the cosmology of Aetheus, the Astral Plane can be described as a shapeless cloud that surrounded all other planes (including the Inner Planes, which were not accessible via the Astral). It has also been described as being "above" the Prime Material Plane and its two reflections, the Feywild and the Shadowfell. The dominions of the gods are set adrift to wander about in the silvery void. Access to the Astral Sea was accomplished through passages found in the world or through proper ritual. Once in the Sea, travel was initiated by thought and was very similar to flying. Direct connections between separate dominions of the Gods was only possible by cooperation between the deities in question.   In addition to the astral dominions, the Astral Sea could be used by powerful beings to create demiplanes by focusing on an idea and applying a strong will. Each demiplane had its own traits and physical laws as dictated by the one who created it, and was always smaller than an astral dominion. If abandoned, it would break apart and fade from existence just like an astral dominion.   The Astral Plane had the following traits in this cosmological model:
  • Subjective Directional Gravity: A traveller picked a 'down' direction and 'fell' in the direction until a new direction was chosen.
  • Timeless: the effects of time were suspended until the traveller exited the Astral Plane, whereupon the effects retroactively occured.
  • Mildly Neutral-Aligned: No circumstance penalties.
  • Enhanced magic: Spells and spell-like abilities required less time to be cast.
Colour pools still existed in this model, but an Astral traveller had to choose the destination plane before setting out and would only encounter pools that lead to the chosen plane. To change directions,the traveller had to re-enter the Material plane and then begin the journey anew.    

Inhabitants


On this plane of thought, the existence of true natives was doubtful. The githyanki, however, had been a dominating presence for long ages, ruled from their great city of Tu'narath but mostly spread about innumerable fortresses. Astral searchers, astral streakers, astral whales and the mighty astral dragons inhabit the Silver Void. The dreaded astral dreadnoughts are believed by some to be a manifestation of the Astral Plane itself, while others point to their indefinetly long tails as indicator for an origin elsewhere.   All manner of fiends, celestials, slaadi and other planars used the Astral as short-cuts to their business elsewhere, but both astral devas and shedu patrolled the plane regularly to keep evil in check. Despite their connection to the Abyss, bebilith were thought to be at home on the Astral plane.   Spectral hounds are usually found with githyanki communities as guard animals.  

DEITIES


The Astral Plane was the graveyard of the gods. If a deity, which could be considered among the greatest of concepts, died, its remnants were cast into this realm of thought. Here it remained as a floating "god-isle", a piece of solid matter within the endless empty void, with only a fraction of residual energy left.
Type
Dimensional plane