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Astronomy Picture of the Day
The Merope Reflection Nebula
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#101629
by
[z]Barbara Harris
@
12.06.2007 00:00
- nach oben -
The Merope Reflection Nebula
Explanation:
Reflection nebulas
reflect light from a nearby star.
Many small
carbon
grains in the nebula reflect the light.
The blue color typical of
reflection nebula
is caused by blue light being
more efficiently scattered
by the carbon
dust
than red light.
The brightness of the nebula is determined by the
size and density of the reflecting grains,
and by the color and brightness of the neighboring star(s).
NGC 1435
,
pictured above
, surrounds
Merope (23 Tau)
, one of the brightest stars in the
Pleiades
(M45).
The
Pleiades
nebulosity is caused by a
chance encounter between an
open cluster
of stars and a
molecular cloud
.
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