How long does the black drop effect will take on the next Transit of Venus

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How long does the black drop effect will take on the next Transit of Venus

[From: ] [author: ] [Date: 12-05-17] [Hit: ]

com/watch?http://www.transitofvenus.nl/blackdrop.h…-My recollection is that it took 10 to 15 seconds during the 2004 transit. It probably varies depending on the seeing and the angle of ingress/egress.......

The black drop effectoo is a rare efect (optical illusion) produces when the disco of Venus is inside the solar disc.

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http://www.youtube.com/watch?v=9JPO6nfkr…

http://www.transitofvenus.nl/blackdrop.h…

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My recollection is that it took 10 to 15 seconds during the 2004 transit. It probably varies depending on the seeing and the angle of ingress/egress.

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