John E. Pool Delta, Colorado USA
The Horsehead Nebula is a cold cloud composed mainly of dust,
ice particles and hydrogen gas about 1500 LY away in the Orion Arm
of the Milky Way galaxy.
Behind this cloud are numerous hot, young stars which emit intense
This radiation causes the hydrogen gas surrounding these stars to
flouresce creating a silouette.
The direct light from some of these stars is absorbed by the cloud,
hiding them from view.
Over the next billion years, more new stars will be born within
the dark cloud altering its appearance.
Date & Timings
10/14/99 commencing at 0309Z
Single 60 min exposure
Meade 12" LX200 @ f 6.3
SBIG ST7 CCD camera w/ AO
AO @ 330 ms sample rate
Delta CO USA
Lon 108W04 Lat 38N45
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