If you follow each of these links, in this order, you’ll get the big picture:

The first link  is from the American Museum of Natural History.

The second link is from the SLOAN digital sky survey.

The third link is a somewhat different SLOAN digital sky release — an important step in understanding the view.

The fourth link is to a news story on BBC.

The fifth link is to the Eighth Data Release (DR8) web site.

Great stuff, in every sense.

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