The Virtual Amateur Astronomer®, Image of Horsehead Nebula, Internet Astronomy by Jupiter Scientific
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A Dark Nebula
Located near the easternmost star Zeta Orionis (Alnitak) of Orion's Belt (See Sky Altlas) of three stars
is the Horsehead Nebula:
The nebula is so small that one cannot see that it is in the shape of a horse's head. It just looks
like a semi-circle of black against a diffuse luminous background. The Horsehead Nebula
is created by dust and dark gas that block out the light from the nebula IC 434. Also
visible in the eyepiece above the Horsehead Nebula is Alnitak and to the left of it is
the Flame Nebula NGC 2024. Sigma Orionis is to the right of the Horsehead Nebula, and
the object just to the upper left of the Horsehead Nebula is
the reflection nebula NGC 2023, a non-luminous cloud of dust rendered visible by light reflected
off it from a nearby star here, it is so small that is looks like a star.
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