See also:

• BLACK
• BLACK, ADAM (1784-1874)
• BLACK, JEREMIAH SULLIVAN (1810–1883)
• BLACK, WILLIAM (1841-1898)

BLACK DROP  , in See also:

• ASTRONOMY (from Gr. &arpov, a star, and v ,usiv, to classify or arrange)

astronomy, an apparent distortion of the See also:

• PLANET (Gr. ssXavirrns, a wanderer)

planet See also:

• MERCURY
• MERCURY (MERCU1uus)
• MERCURY (symbol Hg, atomic weight = 2oo)

Mercury or See also:

• VENUS

Venus at the See also:

• TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
• TIME, MEASUREMENT OF
• TIME, STANDARD

time of See also:

• INTERNAL

internal contact with the See also:

• LIMB

limb of the See also:

• SUN
• SUN (0. Eng. sonne, Ger. sonne. Fr. soleil, Lat. sol, Gr. ijXior, from which comes helio- in various English compounds)

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 See also:

• ATMOSPHERE (Gr. fir µ6r, vapour; orkaipa, a sphere)

atmosphere or by the See also:

• ABERRATION (Lat. ab, from or away, errare,, to wander)

aberration of the See also:

• TELESCOPE

telescope .