latitude, its distance
being 8.7 light years. At this distance the Sun would appear as a star
a little brighter than the Pole Star.

[Illustration: CANIS MAJOR]

ARGO NAVIS ([:a]r'-go n[=a]'-vis)--THE SHIP ARGO. (Face South.)

LOCATION.--Argo is situated southeast of Canis Major. If a line
joining Betelgeuze and Sirius be prolonged 18[deg] southeast, it will
point out Naos, a star of the second magnitude in the rowlock of the
Ship. This star is in the southeast corner of the Egyptian "X."

The star [p] is of a deep yellow or orange hue. It has three little
stars above it, two of which form a pretty pair.

The star [z] has a companion, which is a test for an opera-glass.

The star [k] is a double for an opera-glass.

Note the fine star cluster (46 M.).

The star Markeb forms a small triangle with two other stars near it.

The Egyptians believed that this was the ark that bore Osiris and Isis
over the Deluge.

The constellation contains two noted objects invisible in this
latitude, Canopus, the second brightest star, and the remarkable
variable star [[^e]].

[Illustration: PUPPIS]

MONOCEROS (m[=o]-nos'-e-ros)--THE UNICORN. (Face South.)

LOCATION.--Monoceros is to be found east of Orion between Canis Major
and Canis Minor. Three of its stars of the fourth magnitude form a
straight line northeast and southwest, about 9[deg] east of Betelgeuze,
and about the same distance south of Alhena, in Gemini.

The region around the stars 8, 13, 17 is particularly rich when viewed
with an opera-glass.

Note also a beautiful field about the variable S, and a cluster about
midway between [a] and [b].

Two stars about 7[deg] apart in the tail of the Unicorn are pointer stars
to Procyon. These stars are known as 30 and 31. The former is about
16[deg] east of Procyon, and is easily identified as it has a
sixth-magnitude star on either side of it. About 4[deg] southwest of this
star a good field-glass will reveal a beautiful star cluster.

[Illustration: MONOCEROS]

ERIDANUS ([=e]-rid'-a-nus)--OR THE RIVER PO. (Face Southwest.)

LOCATION.--Three degrees north and 2[deg] west of Rigel, in Orion, lies
[b] Eridani, the source of the River. Thence it flows west till it
reaches [p] Ceti, then drops south 5[deg], thence east southeast, its
total length being about 130[deg].

The great curve the River takes, just east of the Whale, resembles a
horseshoe.

Acherna, the first-magnitude star in Erid