Hodierna, Giovanni Battista (1597–1660)
Italian astronomer at the court of the Duke of Montechiaro whose De Admirandis
Coeli Caracteribus (1654) describes some 40 objects found with a simple
Galilean refractor of magnification
20. Hodierna discovered the open clusters now known as M6, M36, M37, M38,
M41, M47, NGC 2362, NGC 6231, and NGC 6530 (the cluster associated with
the Lagoon Nebula) and several comets,
and made the earliest surviving drawing of the Orion
Nebula, in which three of the Trapezium
stars are shown. His astronomy seems always to have verged toward astrology,
and titles on astrology bulk large in his corpus of work.
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