Assume the Sun located in the point marked “S” in Fig. 5 and some
distance above the plane of the picture, then the nebula if viewed
from this point would appear somewhat as the Milky Way appears to
us. In the middle we behold the substantial nucleus and on its left
side a cleft between the two branches of the inner spiral. Farther
to the left, we see only the outer spiral, first broadening toward
the left where it approaches “S,” then narrowing only to spread again
on account of the great clustering in the lower right part of the
spiral. The axis of the nebula corresponds to the densest parts of
the Galaxy in Cygnus (the Swan), the loop in the inner spiral again
to the empty space between Cepheus and Cassiopeia, the narrow part
of the outer spiral branch resembles the constriction at Algenib,
the following diffusion corresponds to the broad section in Auriga
(Charioteer) and Monoceros (Unicorn). At the subsequent narrow place
we see the outer nebula-clump corresponding in certain respects to the
Magellanic clouds on our firmament although these are farther removed,
and apparently not indigenous to the Milky Way. There follows in the
nebula a massive section in our system represented by the well known,
far less compact, yet brightly luminous tract containing the Southern
Cross. Here, from the star Alpha in Centaurus--the nearest bright fixed
star[3] to our Sun, “only” 4.5 light years or about 25 trillion[4]
miles distant--commences a bi-section of the spiral and strangely
enough the nebula is similarly forked. Now the outer spiral stretching
in a faint line upward from the “clump” begins to show as a weak band,
while the inner spiral stands forth powerfully above “S” corresponding
to the brilliant section of the Galaxy in Scutum (Shield) and Aquila
(Eagle). The partition in the nebula between these two branches is
the counterpart of the 110° long “prong” in the Milky Way between the
constellations Norma and Lyra. Numerous faint bridges join the two
branches in the nebula as well as in the Galaxy, according to Wolf.
Public-domain text, read in full here on John Shaqi.
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