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1. We should postpone the discussion of the stars in the 15th hour which belong in Ursa Minor, in Draco, and in Libra, because these constellations are only beginning here.

Instead we ought to concentrate on the stars in Centaurus - this constellation has many stars and its beginning is already in the 12th hour.

Let's therefore proceed hour for hour and begin with those 4 stars with Greek letters in the 12th hour. But first a quick look at the figure:

We recognize the Southern Cross. The picture is from Christoph Semler's Coelum stellatum in quo asterisimi I. boreales II. zodiacales III. australes albicantibus in plano nigro stellis methodo ... convenientissima exhibentur (1731) and I have copied it from Linda Hall's site.

Centaurus is spearing the Lupus (Wolf) constellation. Hevelius has drawn it too:

Lupus is below the Scorpion, indeed in touch with the creature.