| | | _White | |
_Galactic | _Helium | _Hydrogen | Yellow | _Yellow | _Red
Latitude_ | Stars_ | Stars_ | Stars_ | Stars_ | Stars_
---------------+---------+-----------+--------+---------+-------
±8.1° | 51.2 | 37.4 | 29.7 | 29.4 | 26.7
±21.6 | 31.7 | 28.6 | 27.9 | 26.7 | 27.6
±39.8 | 11.9 | 18.3 | 21.1 | 21.9 | 23.6
±62.3 | 5.2 | 15.7 | 21.3 | 22.0 | 22.1
Number of | | | | |
stars observed | 716 | 1885 | 1329 | 1719 | 457
The difference is most pronounced in the two first groups; in the
three last it is small but unmistakable. An even distribution would
correspond to 25 per cent. in all four divisions of the heavens.
These comprehensive statistics, embracing 6106 stars, seem to indicate
that the stars in their first stage were within the Milky Way but
subsequently drifted away with increasing age. This leads us to the
thought that they originated from the irregular, nebulous accumulations
which occur in the Milky Way and in its vicinity, or more correctly
from similar formations which formerly existed in these regions but
which now have clustered into stars. This agrees very well with
another observation. With the help of the spectroscope the motion
of different stars has been determined with reference to the point
where the sun now is. The velocities have been found greater the
older the stars are as shown in the table below taken mainly from the
investigations of the renowned astronomer, Campbell.
_Mean velocity of_:
Irregular nebulæ 0 Km. ( 0 Miles) per sec.
Wolf-Rayet stars 4.5 ” ( 2.8 ” ) ” ”
Helium stars 6.5 ” ( 4.0 ” ) ” ”
Hydrogen stars 11 ” ( 6.8 ” ) ” ”
Yellow stars 15 ” ( 9.3 ” ) ” ”
Red stars 17 ” (11.5 ” ) ” ”
Planetary nebulæ 25 ” (15.5 ” ) ” ”
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