The Astrology of Space - Matrix Software

The Astrology of Space
plane of the galaxy and form a more nearly spherical
system, like that filled by the globular clusters.
Long-Period Variables
The Long-period variables, as their name suggests,
have periods that range from ninety days up to six or
seven hundred. They have spectra of Classes M, S,
R, and N, -- the coolest stars -- and large light ranges
(from between three to six magnitudes). They are
very common in our galaxy, which contain 100,000
such stars. Perhaps the most famous of the longperiod
variables is Mira Ceti, "the Wonderful," which
has been known for centuries. These stars are rare or
never found in globular clusters.
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