North is ~ to the
left. The image is rotated 70 degrees CCW.
The Western Veil, NGC
6960, commonly named The Witch's Broom, is part of the Veil Nebula,
which is also known as the Cygnus Loop. The Veil nebula is located
in the constellation, Cygnus, at a distance of about 1400 light-years. Its
apparent size is more than five times the full Moon.
The Veil Nebula is a supernova remnant of heated and ionized gas.
The source supernova exploded some 10,000 to 20,000 years ago. The
expanding debris cloud gains its colors by sweeping up and exciting
existing nearby gas.
These false color
images were acquired with SII, Ha and OIII filters mapped to the RGB
channels respectively. The upper image was processed to produce the
orange and blue colors, made popular by the Hubble Imaging Team. The
colors of bottom image follow the Hubble Palette, with the color
channels more evenly stretched. The presence of sulfur, hydrogen and
oxygen are clearly shown. Red indicates the presence sulfur, green
hydrogen and blue oxygen. No color manipulation produces a basically
green image, due to the dominance of hydrogen.
Focal Pointe Observatory
Astrophotography by Bob Franke
North is ~ to the left. This close up
view of IC 1805 is rotated 110 degrees CCW.
The colors in the top image follow the
spirit of the Hubble Palette. This image
uses Ha, SII and OIII filters mapped to the
red, green and blue channels respectively.
The bottom image uses the same filter
mapping with adjustments to the channel
levels to create the blue and gold motif,
made popular by the Hubble Imaging Team.
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, nicknamed the Heart
Nebula. 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. The top image shows the light from
sulfur atoms in red hues, with hydrogen in
green, and oxygen atoms in blue.