IC 1805 - The Heart Nebula 11/28/2010
Image Capture Details

Optics:  Celestron Edge HD 11 @ F/2 with HyperStar
Mount: CGE Pro
Camera: QHY8
Filters: LPS
Exposure:  43X 300Seconds = 210 Minutes
Time: 8:15pm - 11:11PM
Location: Waldwick, NJ
© 2008 David A. Trapani
All Rights Reserved
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1.  Sprawling across hundreds of light-years, emission nebula IC 1805
is a mix of glowing interstellar gas and dark dust clouds. Only about
7,500 light-years away, stars were born in this region whose
nickname - the Heart Nebula - derives from its suggestive shape (seen
here sideways). This gorgeous, deep telescopic image of the nebula is
very colorful, but if you could travel there and gaze across these
cosmic clouds with your own eyes, are those the colors you would
really see? The short answer is no, even though the image was made
with light visible to the human eye. Light from this and other glowing
gas clouds surrounding hot, young stars comes in very narrow bands
of emission characteristic of energized atoms within the clouds. In
fact, the nebular glow is often dominated by hydrogen atoms emitting
light in only a small fraction of that broad region of the spectrum that
we see as the color red. Adopting an artificial color scheme commonly
used for narrow band images of emission nebulae, this beautifully
detailed view shows the light from sulfur atoms in red hues, with
hydrogen in green, and oxygen atoms in blue.

1.  http://apod.nasa.gov/apod/ap040917.html