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B33, "The Horsehead" Nebula in Orion. Discovered
photographically by Edward C. Pickering in 1889, this famous
dark nebula is a collision zone of two dust clouds and made
visible by the impact. Estimated to be at a distance
of 1200 light years, "The Horsehead" is an extreme
challenge to the visual observer, requiring large
aperture and perfect observing conditions. Tri-color image,
using the Pictor 1616XT with the 25" Newtonian at f/5.
Exposure data; 5 minutes in red, 20 minutes in green, and
40 minutes in blue.
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