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astrokido
sage
Reged: 06/09/08
Posts: 248
Loc: Phoenix, AZ
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Re: The vast "empty quarter" east of Sagittarius
07/28/08 01:31 PM
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Some of those regions may seem empty only because the DSOs in them are too far away. That's why the Fornax region was chosen to obtain the deepest image of galaxies so far by the HST. The region is actually pretty crowded if you can see far enough away, as seen in the linked images. It's just that nearer objects easier to view are distributed over other regions of the sky. The spacial distribution isn't uniform like you say "that's just how matter fell out in this region". The DSO's there just fell further away from where we are in the Universe. We'd see a very different sky if our galaxy was among those distant galaxies.
Also, many areas near the galactic plane are obstructed from view by dense clouds of dust. That keeps many objects out of typical views, like the Milky Way center, which is only visible in some infrared wavelengths that can see through the dust.
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