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http://www.msnbc.msn.com/id/14062964/

Quote:
An enormous amoeba-like structure 200 million light-years wide and made up of galaxies and large bubbles of gas is the largest known object in the universe, scientists say.

The galaxies and gas bubbles, called Lyman alpha blobs, are aligned along three curvy filaments that formed about 2 billion years after the universe exploded into existence after the theoretical Big Bang. The filaments were recently seen using the Subaru and Keck telescopes on Mauna Kea.
200 million light-years! That's (approximately) 1,175,699,960,000,000,000,000 miles (is that heptillian?).
 

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