Redshift surveys have revealed the largest structures yet observed in the
The prominent concentration of galaxies running diagonally
across the northern (that is, upper)
portion of the adjacent image has been termed the
Wall. It appears that
Preliminary deep space redshift surveys along narrow pencils of direction
indicate a periodic structure suggesting that there may be additional Great
Wall type structures out there, but we have insufficient information at this
point to map them extensively.
It covers at least 85 Mpc in declination and 215 Mpc in right
ascension. It is likely to be
even larger because it is obscured by dust in the
plane of our galaxy on one end and hasn't yet been mapped on the other.
It is less than 7 Mpc thick.
There is a corresponding structure in the southern sky termed the
Southern Wall. Because neither the Northern Wall nor the Southern Wall
have been mapped fully, it is even possible that the two join each other
in the parts of the sky that have not been examined yet and
are part of one much larger structure.