Great Wall (astronomy)
The Great Wall is the second largest known super-structure in the Universe.
Great Wall
A sheet of galaxies which stretches more than 500 million light-years across the sky.
Great Year ...
Great Wall of China
The Great Wall of China or is a series of stone and earthen fortifications in China, built, rebuilt, ...
The Sloan Great Wall (not to be confused with the Great Wall) has been measured to be approximately one gigalight-year distant.
46.5 Ã- 109 ly ...
Can You See the Great Wall of China from Space?
Surface Area of the Earth
What is the Biggest Island on Earth?
What is the Largest Desert on Earth?
Where is the Most Remote Location on Earth?
Continental Crust
Population of the Earth ...
However, based on redshift survey data, in 1989 Margaret Geller and John Huchra discovered the "Great Wall," a sheet of galaxies more than 500 million light-years long and 200 million wide, but only 15 million light-years thick.
on angular directions in the sky that correspond to distance scales on the order of 10^9 light-years across (still larger than the largest material structures seen in the universe, such as the enormous grouping of galaxies dubbed the "Great Wall").
Our journey from the Milky Way to the Great Wall in the past two chapters has widened our cosmic field of view by a factor of 10,000, yet the galaxies that make up the structures we see show remarkable consistency in their properties.
In an even larger scale, recent galaxy survey shows some large scale structures such as the Great Wall and the Voids. Can we conclude that our universe is inhomogeneous?
In the local Universe, there are two large-scale structures of particular importance: the Great Wall and the Great Attractor.
Note that while there are many voids and great walls with sizes of 100 Mpc (6500 km/sec) the large scale pattern is more uniform. The LCRS did not see "super Great Walls" or "super voids".
Ned Wright's Home Page ...
The Great Wall, a galactic filament discovered in 1989, stretches across more than half a billion light-years of space.
721-725, several sites in Hue, Vietnam to Lingqui, China (near the Great Wall), were selected in a nearly straight North-South line. Their result was that 1° of latitude was 155 km, where the actual value is about 111 km.
In 1989, Geller and Huchra discovered this "Great Wall," a sheet of galaxies that extends for at least 500 million light-years, perhaps even more. This may be the largest structure in the universe.
LOCAL GROUP ...
Others theorize that the early universe broke first into colossal clumps that contained enough building materials to make structures on the grandest scale " great walls and sheets of millions of galaxies " that fragmented into increasingly smaller ...
A "split" in the Milky Way between Cygnus and Sagittarius caused by a succession of large, overlapping dark clouds in the equatorial plane of the Galaxy. It is about 100 pc distant. [H76]
Great Wall ...
Large Scale Structure, Great Wall, Bootes void
expanding universe, Hubble's Law, Hubble constant, cosmological constant/lambda, Einstein Static Cosmology, Steady State Theory, dark energy
How the universe will end, The Heat Death of the Universe ...
Great Wall
greatest elongation
Green Bank
Green Bank Telescope
Gregorian calendar
Groombridge Catalogue
grooved terrain
ground-level event (GLE)
Grus (constellation)
Grus Quartet (NGC 7552, NGC 7582, NGC 7590, and NGC 7599) ...
Linear transverse structures such as the "Great Wall" probably appear thinner than they really are due to this effect (at the 150 km/s or so level anywa; Dell'Antonio, Geller & Bothun 1996 AJ 112, 1780).
1989 - Margaret Geller and John Huchra discover the "Great Wall", a sheet of galaxies more than 500 million light years long and 200 million wide, but only 15 million light years thick, ...
 See also: Light, Earth, Universe, Galaxy, Galaxies
  
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