Planar Space

Planar Space is a term referring to a universe through which ships travel from star system to star system. It is the current means for interstellar travel for the Humankind Empire of Abh and the four Nations Alliance to control and travel the Milkyway Galaxy.

Normal Space
Normal Space is a term referring to the four dimensional space-time with it's Einsteinian Relativity. For a centuries travel trough normal space has been a dangerous, tedious, and long term adventure for humans.

Plane Space
Normal Space is a term referring to an alternate universe with two spatial dimensions and one time dimension. It has different laws of physics than normal space. It connects vast distances in Normal Space within reachable distances. Natural access to Plane Space is possible through Sords or Gates. Matter that enter a Sord from Normal Space is transformed into Space-Time particle (Supflasath). Traveling ships need a space-time generator to create artificial normal space encasing the ship to protect it. This space is called a space-time bubble (Flasath). Space-Time particle that exit a Sord from Plane Space are released as visible energy. The stream of matter or space time particles is determine by the vacuum pressure within Normal Space. A Sord that is close to a star will be under the solar pressure of the star and receive more matter from the solar wind. Sords that are near the galactic center receive the high pressure of young stars and the galactic pressure waves leading to a constant stream from those Sords. These 'volcano' Sords are known as Kiigaf. Because of the high streams of these Sords the galactic center is near impossible to navigate. The streams of space-time particle act as a fluid in plane space and create friction to traveling ships. Therefore, these streams are displayed as density gradients which make Sords look like hills or valleys. A ship traveling through plane space 'displaces' or disturbs the space-time particle sea which send out mass waves (Sesuwas) detectable by sensors. Mass waves travel indefinitely through Plane Space. The frequencies and wavelengths of mass waves are fixed in Plane Space; they overlapped and created unavoidable interference. Sending Space-Time particle is the only effective means of communication. However, transmission speed is slow and has very limited range. For distance communication, communication boats or ships are necessary.

History
The theoretical work for plane space was first published by Nadia Hudini (ナディア・フーディニ) for a mathematical lecture. Through trade during the Wandering Age the Abh gain access to the Hudini theory. Bibo Suryumune, a specialized scientist in stellar evolution, became aware of the theory, and discovered the possibility of plane-space navigation, including its research. Through long research the Abh were finally able to create a space-time generator which allowed travel through plane space. Independently, human people from Midgrat (now Dakufo) in the Suumei system developed their own plane space technology shortly before the Abh. The Midgratian happily sold their technology for a price to various human colonies.

Yuanon particle
After a long time of sending ships into space, a research vessel named the Oort Cloud Oort_Cloud|Seikai Novels#Crest of the Stars - Book 1 Scientists named them Yuanons. Then for a long time these rare and precious particles were used as the heart of interstellar ships to explore distant system ad colonized them. It was only later that they were discovered to be the state of a closed Sord.
 * http://en.wikipedia.org/wiki/Oort_Cloud|Oort Cloud discovered a mysterious particle approximately three-tenths of a lightyear from the sun. It was only about a thousand times the mass of a proton, but radiated nearly five hundred megawatts of energy. It was hypothized as a "white hole" or "null space" or "hyperspace."