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Galaxy
distributions seen in images are 2-d
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projections
on the sky.
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Need
distances�easiest way is to use the
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Hubble
flow and redshifts, either
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photometric
or spectra (best).
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Reminder
� SDSS and 2dF rule here now.
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Huchra
and Gellar�s �Z-machine� for the
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CfA
survey as recounted in �Lonely Hearts
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of
the Cosmos� by Dennis Overbye � Great!
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