The Astrology of Space - Matrix Software

The Astrology of Space
an otherwise dusty region of space. (See the section
on Solar Wind)
Nebulae can also become luminous when a nearby
bright star causes them to shine by reflected light.
The Pleiades was the first reflection nebula to be
observed. The reflection nebulae reflect the light of
stars embedded within them. It is not known whether
reflection nebulae are only dark clouds that happen to
be near a bright star or whether some actual physical
relationship may exist between the reflection nebulae
and the stars that illuminate them. It has been noted
that stars of "B1" or later (see section on spectral
Type) produce reflection nebulae, while stars of "BO"
or earlier produce emission nebulae.
Reflection Nebulae
In some nebulae, the star producing the illumination is
not hot enough to make the nebulosity shine by its
own light and the result is a reflection nebula.
223