First encountered during the Distant Suns expedition of January 3301, this particular sector is one of several anomalies found throughout the galaxy. For reasons unknown, hyperdrives refuse to lock on to the stars in this area of space, effectively making it impassable to deep space travellers. Pilots are thus required to either avoid this area or to plot a course above, below or around it. What may be found within this restricted area remains a mystery for the time being.

The entire complex of Bleia sectors spans a much larger area than most other restricted sections of the galaxy, extending up to 700 LY above and below the galactic plane and several thousand LYs wide and deep. This has giving rise to the nickname "The Thargoid Wall" among some deep-space travellers (source).

Links:

• Updated Permit List
• Galactic Mapping Project

In November 3303 the Aronnax Expedition conducted a survey on the borders of Bleia for signs of spacefaring activity, as well as outdoor worlds and systems with all the materials needed for FSD boosting ('green' systems). A good location for a 'Forward Base' was discovered just under 400 LY from the Bleia3 border: Hyuqau FN-H d11-3454 not only hosts an Earth-like World but it is located close to a group of neutron stars - there are nine within 50 LY - allowing quick access towards or away from the border. The region around the Forward Base system was found to host an unusual number of worlds with surface conditions compatible with organic structures. The Bleia borders are vast and the expedition can barely be considered to have scratched the surface, however the region surveyed contained many more Ammonia Worlds than Earth-like Worlds, with nine Ammonia Worlds being found but only two Earth-likes; full details on the expedition's findings are given in the journal here:

Link:

Bleia Border Report