The Astrology of Space - Matrix Software

The Astrology of Space
(Sch) I Lac, (Ru) Lac I
OA 00°Ta20'40 +60°25'41 64 Cepheus OB 3
(Mo) III Cep, (Ru) Cep IlI
OA 28°Ar57'20 +56°52'49 66 Cassiopeia OB 2
(Ma) Cas II, (Sch) V Cas
OA 04°Ta04'21 +52°59'07 68 Cassiopeia OB 5
(Ma) Cas V, (Mo) I Cas
T-Associations
T-Associations are groups or clusters of very young
stars that are very near to our Sun. Along with the O-
Associations, these are the nearest groups of celestial
objects. T-Associations are loose groups of T Tauri
and RW Aurigae stars at distances from about 100 to
1000 parsecs from the Sun. There are about forty of
these associations known, most with fewer than thirty
members, although there may be as many as four
hundred. T-Associations have received much
attention in recent years from astronomers due to the
fact that T Tauri stars are closely associated with
strong clouds of interstellar dust and are often
observed near or within these dark nebulae.
Armenian astronomer V. A. Ambartsumian sees in
these compact associations of variable stars a special
class of stars, possible in the condensing stage –
young or very young stars. These T Tauri stars help
to bridge the gap between protostars (newborn stars)
and the younger stars (T Tauri stars = age less than
10 7 ). The spherical shape of the T-Associations or
clusters is an indication that these young stars will
disband in a relatively short period of time. They are
unstable.
The T Tauri stars exhibit erratic variations that may
be, in part, extrinsic. They have luminosity
comparable to our Sun, although their spectra are
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