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Category:Astronomy

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[[Category:Scientific disciplines]]
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[[File:Astronomy 1876 Spectrum Observation Disks.jpg|200px|thumb|left|A 1876 drawing of spectrum observation disks.]]
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[[Category:Scientific_disciplines|{{PAGENAME}}]]

Revision as of 16:11, 28 September 2012

A 1876 drawing of spectrum observation disks.
A 1876 drawing of spectrum observation disks.