164 
HAROLD’S DISCUSSIONS. 
just three degrees long and are a convenient measure 
of distance in the sky. This constellation contains 
some of the most interesting telescopic nebulse in the 
heavens. Orion, the mighty hunter, was pursuing 
the seven innocent, affectionate sisters, when Jupiter 
in pity transferred all of them to the heavens. South 
of Orion is a cluster of four stars called the Hare. 
Fig. 83.—A spectroscope attached to the Yerkes telescope. 
As the Earn approaches the meridian the 
“ Twins,” or Gemini, begin to rise. This cluster 
may be seen in the form of two nearly parallel lines. 
Two stars of the first and second magnitudes in the 
head are Castor and Pollux, Pollux is used as one of 
