Gemini lies northeast of Taurus, and is outlined by a box-shaped figure
something more than twenty degrees long and about five degrees wide.
The two stars marking the end of it farthest from Taurus are the famous
twins, Castor and Pollux.[3] Pollux is a first-magnitude star, and
Castor is very little less bright. They are both very charming stars,
and too conspicuous to escape easy identification. Castor is greenish
in tint, and rises between an hour and a half and two hours later than
Aldebaran. About fifteen minutes after he appears, Pollux, with a
yellow-tinted face, comes up over the eastern horizon. They rise about
thirty degrees north of the exact east. The ecliptic has reached its
highest point north just after passing through the horns of Taurus.
It then runs through Gemini in a southeasterly direction, curving
diagonally across the main figure and passing five or six degrees
below Pollux. Gemini can be seen from October to early June. It is
particularly charming in May in the northwest just after sundown, and
when any of the planets are going along this part of their path at that
season, they are sure to win one’s interest and admiration.
[3] See “The Heavenly Twins” in _The Friendly Stars_.