BLACK DROP , inastronomy, an apparent distortion of the
See also:planet Mercury or
See also:Venus at the
See also:time of
See also:internal contact with the
See also:limb of the
See also:sun at the beginning or end of a transit . It has been in the past a source of much perplexity to observers of transits, but is now understood to be a result of irradiation, produced by the atmosphere or by the aberration of the
See also:telescope .
THE BLACK COUNTRY
BLACK FOREST (Ger. Schwarzwald; the Silva Marciana ...
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