NavList:

C.A. you wrote:
"The observations of the  transit of venus in tahiti were not as precise as
hoped since the timing of when  venus first met the suns disc could not be
determined with accuracy as a halo  due venus atmosphere and an optical effect
called blackspot. "

Did you  see the transit of Venus in June, 2004 (there's another in 2012 if
you missed  it)? It was entertaining; Venus makes such a big spot on the Sun.
This transit  was the first that could be video-ed, and it's interesting to
note that the  famous "black drop" effect was not visible at all to many
observers. Here's an  article from Sky & Telescope entitled "Where Was the Black
Drop?":  http://skyandtelescope.com/news/article_1277_1.asp

-FER
42.0N 87.7W,  or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars 


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