SPHERICAL ASTRONOMY. 95 
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horns of Taurus; the rich region about Vega and Lyra; the so called 
Lucida Lyre ; the numerous stars about Arcturus (jig. 16), in Bootes, and 
the vicinity of the great remarkable nebula (jig. 17) in Orion. 
With respect to the nebulous spots and stars, pl. 13 (figs. 1 to 20) repre- 
sents twenty of the largest and most beautiful. Fig. 1 is a double nebula 
in Gemini (108° 45’ right ascension, and 29° 49’ declination), consisting of 
two round nebule touching each other, which shine almost like stars. 
Fig. 2 exhibits the double nebula in Coma Berenicis (right ascension 
187° 0’, declination 12° 8’), of great brilliancy. Sig. 3 gives a view of a 
small double nebula of right ascension 158° 15’, declination south 17° 55’. 
Fig. 4 is a curiously shaped nebula in Ophiuchus (Serpentarius). Fig. 5 
represents two nebulous spots touching each other nearly at right angles, 
of tolerably elliptical shape, to be found in the constellation of Canes Vena- 
tici. ig. 6 represents the remarkable annular nebula in Lyra, rt. asc. 281° 
45’, N. dec. 32° 49’, whose opening is filled with a second ash-grey nebula 
the whole appearing like a veil drawn over an almost circular hoop. At 
33° 0’ of right ascension and 41° 34’ North declination, in Perseus, is seen a 
distinct and very eccentric nebula (jig. 7) of 4’ length and 40” breadth, in 
whose midst is a concentric, also elliptical, space, at whose two extremes 
two little stars are seen. Still more remarkable is the nebulous spot 
(rt. asc. 268° 0’, S. dec. 23° 1’) in Sagittarius (jig. 8), seemingly split into 
three pieces; a double star is seen in the midst of the dark interspace 
Fig. 9 gives a view of the extremely remarkable and tolerably large nebula 
in constellation Robur Caroli’af the southern hemisphere, consequently not 
visible in the northern. A number of minute stars will be observed to 
shine out from it. 
The following may be particularly mentioned among the number of 
irresolvable planetary nebula. The well known great nebula in Andro- 
meda (pl. 13, fig. 10), visible to the naked eye, of peculiar feebly glimmer- 
ing light, 30’ in diameter; the stars standing in its vicinity do not appear 
to belong to it. A nebula (fig. 11) occurs in Cetus, similar to the one in 
Perseus (jig. 7), only longer and broader. A curiously shaped elongated 
nebula (fig. 12) is met with in Cygnus, while planetary, entirely round, and 
brilliant nebulous spots exhibit themselves in Sagittarius (jig. 18) and the 
hand of Andromeda (fig. 14). A spot.(jfig. 15) similar to these last is 
shown in Orion, and a granular nebula, with a very bright spot, in Ursa 
Major (rt. asc. 127° 45’, N. dec. 50° 49’). But the most remarkable, 
perhaps, of all is the great nebula in Orion (fig. 17), under the middle of the 
(so called) Jacob’s Staff, near the star ©; distinguished above all the others 
by its peculiar shape (not unlike the opened jaws of a wild beast), by the 
curious variety in the distribution of its light, as well as by its great extent. 
Even the fixed stars in and about it are remarkable for their lustre, and the 
positions of some of them appear to have a particular relation to the nebula 
itself. It has been supposed, from a comparison of older figures of this 
nebula with its present appearance, that it has undergone a decided change, 
although this is by no means absolutely certain. An almost equally 
remarkable object is found in the constellation Vulpes (rt. asc. 298° 0’ and 
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