Black drop
From LoveToKnow 1911
BLACK DROP, in astronomy, an apparent distortion of the planet Mercury or Venus at the time of internal contact with the limb of the sun at the beginning or end of a transit.
Black Drop Effect
The appearance of a dark band connecting and the during the beginning and end of transits. It is caused by the presence of an atmosphere on .
BLACK DROP EFFECT
The black drop effect is an optical effect that happens early in a transit of Venus, when Venus just travels in front of the solar disk.
Black dropBlack drop effectBlack Duck
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Black dwarf (disambiguation)Black Dyke BandBlack Eagle, Montana ...
The use of Venus transits was less successful than had been hoped due to the black drop effect, but the resulting estimate, 153 million kilometers, is just 2% over the currently accepted value, 149.6 million kilometers.
to convert them into tiff files and PhotoPaint 8 was finally used to assemble a short movie below (click on the image below to start autoplay). The sequence starts around 9:56 UT and ends around 11:40 UT. While seeng was not too good, black drop was ...
In addition, careful observers should be able to detect the black drop effect. Other certificate requirements involve holding public events and assisting schools in understanding and viewing the transit.
famous expedition by Captain James Cook to the Pacific Ocean was to observe the transit from a point far from other observers. Unfortunately, an unexpected observing effect, a "dark bridge" between the disk of Venus and the sky beyond ("black drop ...
 See also: Transit, Time, Venus, Sun, Solar
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