Current opinion is that the black drop effect is due to inferior seeing and/or optics. On Jun 5, 2012 4:59 PM, "Kim" <kimharch@cut.net> wrote:
We have several telescopes set up in front of the visitor center and have had maybe 150 to 200 people milling around watching the transit. No clouds and I didn't set up my scope for pics as I had intended because of the wind. Saw 1st and 2nd contacts in white light. The black drop effect was very cool and obvious even to a couple of people to whom I described it who knew nothing about the transit. I remember not being able to see the black drop in 2003 with Mercury. Maybe we just didn't have enough magnification on it.
Going back outside now.
Kim
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