Carlos Castaneda

[scout1]

Galaxy Clusters & Great Walls (The Largest Structures in the Universe)






A stunningly beautiful galaxy cluster 840 million light years from Earth with a few hundred galaxies gets its name from the strong radio source, 
Hydra A, above, that originates in a galaxy near the center of the cluster. Chandra Space Observatory X-ray observations reveal a large cloud 
of hot gas that extends throughout the cluster.The gas cloud is several million light years across and has a temperature of about 40 million 
degrees in the outer parts decreasing to about 35 million degrees in the inner region. Also a bright white wedge of hot multimillion degree Celsius 
gas is seen pushing into the heart of the cluster. As the largest gravitationally bound objects in the universe, galaxy clusters provide crucial 
clues for understanding the origin and fate of the universe. The Milky Way, for example, is a member of a group of about 40 galaxies we call the
Local Group. Observations have shown that galaxies and galaxy clusters appear to be loosely structured in giant chains ans sheets, forming giant 
structures called superclusters. Between the vast structures of galaxies lie huge cold voids containing few, in many cases, no galaxies. The vastest 
structure ever is a collection of superclusters a billion light years away extending for 5% the length of the entire observable universe. If it took a 
God one week to make the Earth, going by mass it would take him two quintillion years to build this thing - far longer than science says the universe 
has existed for, and it's kind of fun to have those two the other way round for a change. 

http://www.dailygalaxy.com/my_weblog/20 ... verse.html