Talk:Sagitta
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I changed the reference to Orion as violating the Bayer rule of naming the stars in order of brightness into Sagittarius as Orion actually conforms rather well with Beta only being slightly brighter than Alpha and Alpha being variable and possibly brighter when Bayer named them. Sagittarius however has its two brightest stars named Epsilon and Sigma with Alpha way down in the list.--Kalsermar 17:52, 7 November 2005 (UTC)
[edit] Sagitta is also a reference to the depth of curve of a telescope mirror.
Defined by the formula
or
it refers to the glass removed to yield the optical curve. I am writing a book over at Wikibooks on Telescope making and would love to link to an article here at Wikipedia that referenced this bit of knowledge.
vorblesnak@peak.org —The preceding unsigned comment was added by 69.59.203.142 (talk) 20:40, 17 March 2007 (UTC).
