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Author Topic: Astronomers Find Enormous Hole in the Universe  (Read 1235 times)
Pyperlie
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« Topic Start: August 24, 2007, 01:34:42 pm »


Now, this strikes me as pretty wild.

Astronomers Find Enormous Hole in the Universe

Quote
Astronomers have found an enormous hole in the Universe, nearly a billion light-years across, empty of both normal matter such as stars, galaxies, and gas, and the mysterious, unseen "dark matter." While earlier studies have shown holes, or voids, in the large-scale structure of the Universe, this new discovery dwarfs them all.

And a link to the report:  http://xxx.lanl.gov/PS_cache/arxiv/pdf/0704/0704.0908v2.pdf
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« Reply #1: August 24, 2007, 01:52:35 pm »


It is only "wild" because the headline makes it sound so. It isn't a "hole" in the universe in the way we normally think of a "hole."  Large voids -- areas with a very low normal matter density -- are a common part of the structure of the universe.  In fact, most normal matter (stars, galaxies, dust clouds, etc.) forms the "walls" of these large voids (most voids are 100 million to 300 million light years across as I recall, but don't quote me on this). This void is unusual because it is far larger than normal (so large that current hypotheses on how the universe works cannot easily explain it) and because it seems to have FAR less dark matter than other voids do.

It's like some event in the history of the universe swept this huge area clear of most matter -- normal and dark -- leaving us with the questions of when and what and why and how.
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« Reply #2: August 24, 2007, 09:10:29 pm »



Here's an article that gives a bit more detail:

Biggest void in space is 1 billion light years across
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