Diffuse Nebulae are areas of the raw materials, dus and gas, from which stars are born. These Diffuse Nebulae are found along the spiral arms of the Milky Way, and are visible in other nearby galaxies as well.
In an Emission Nebula one or more hot stars causes the nebula to emit light of its own. They have a reddish glow.
A Reflection Nebula only reflects light from nearby stars and shows a blue colour.
Planetary Nebulae have nothing to do with planets, but their name arose from their disk-like appearance. They are almost spherical cast-off shells of gas from very hot stars, late in their life spans. Often the ionized gas has a greenish colour.
On this page the Nebulae are sorted by catalog number.
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![M76 Planetary Nebula [Little Dumbbell Nebula]](../../images/deep_sky/messier/m76/m76_lx200_fr_birb_sc3aclrraw_2006-09-09_00-24_0000_t.jpg)
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; Declination +5 : 03 (deg:m) ; Distance 5500 light year ;<br>
Visual Brightness ? (mag); Apparent Dimension 80x60 (arc min).
<p>
The Rosetta Nebula is a vast cloud of dust and gas, extending over an area of more than 1 degree across, or about 5 times the area covered by the full moon. <br>
Within the nebula, open star cluster NGC 2244 is situated, consisted of the young stars which recently formed from the nebulas material, and the brightest of which make the nebula shine by exciting its atoms to emit radiation. Star formation is still in progress in this vast cloud of interstellar matter.
<p>
Imaging: 135mm SLR Photolens, ATK16IC camera, Astronomik HaRGB filters.<br>
Exposures: Ha: 2x300s + 2x600s; RGB 5x60s.<br>
Imaging and Processing as per my DSO/LRGB tutorials<br>
Seeing: 7/10, transparency 7/10, light frost, urban light pollution.
'))
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![NGC 6826 - Planetary [Blinking] Nebula](javascript:ViewImage('../../images/deep_sky/misc/ngc6826_lx200_pf_birb_sc3acolour_2006-07-24_01-13_0000.jpg',1020,700,'<p>July 23, 2006 23:23 - 23:26 UT.<br>
NGC 6826 - Planetary [Blinking] Nebula.<br>
RA 19 : 44.8 (hours : minutes); DEC +50 : 31 (degrees : minutes)<br>
The Blinking Nebula is so named because when viewed through a small telescope the nebula appears to blink or disappear<br>
as the observer scans the eyepiece.<br>
This is because the nebula is faint compared to the inner relatively bright white dwarf star.<br>
When viewed directly the star is easily visible through the cones of the eyes, while the faint outer nebula<br>
is seen with peripheral vision using the more sensitive rods of the eye.<br>
<p>Imaged with LX200 10-inch f/10 telescope [focal length 2500mm],<br>
Vesta Pro-SC3a colour camera, Baader Infra Red Blocking Filter.<br>
20 unguided exposures of 25 seconds.<br>
Camera settings: Brightness 50, Gamma 97, White Balance automatic, Gain 87.<br>
Seeing: 7/10, transparency 5/10.<br>
Imaging and post-processing as per my DSO tutorial.<br>
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; DEC +38:21 (degrees : minutes); Apparent Diameter: 20. (arc minutes); Distance: 4,250 light years.<br>
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm] with 5 cm extender, Astronomik Ha filter; ATK16IC b/w camera, K3CCDTools.<br>
Exposures: 6x300s; unguided.<br>
Imaging and post-processing as per my LRGB/DSO tutorial.<br>
Seeing: 8/10, transparency 6-7/10, urban light pollution, low 20 day old moon
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![NGC6905 - Planetary [Blue Flash] Nebula](javascript:ViewImage('../../images/deep_sky/misc/ngc6905_lx200_fr_birb_sc3acolour_raw_2006-07-28_23-21_0000.jpg',1020,700,'July 17, 2006 22:58 - 23:10 UT.<br>
NGC6905 Planetary Nebula; Blue Flash Nebula.<br>
NGC6905 is called the Blue Fash Nebula because to the visual observer its blue colour seems to fade in and out.<br>
RA 20 : 22.4 (hours : minutes); DEC +20 : 07 (degrees : minutes);<br>
Apparent Magnitude: 12. p; Apparent Diameter: 1.7 (arc minutes)<br>
Imaging: LX200 10-inch f/10 telescope with 0.33 Focal Reducer operating at f/4.06 [focal length 1015mm],<br>
Vesta Pro-SC3a colour camera in RAW mode, Baader Infra Red Blocking Filter.<br>
17 unguided exposures of 25 seconds.<br>
Camera settings: brightness 38; gamma 71; gain 70; white balance automatic.<br>
Imaging and post processing as per my DSO Tutorial.<br>
Seeing: 7/10, seeing 5/10.'))
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; Declination: +44:20 (degrees:minutes); <br>
Apparent Magnitude: - ; Apparent Diameter: 120. (arc minutes), distance: 1600 light years.<br>
Imaging: 50mm SLR Photolens, Astronomik HaRGB Filters; ATK16IC camera.<br>
Exposures: Lum 5x120s [1x1]; RGB 5x30 [2x2]; all unguided.<br>
Processing as per my DSO/LRGB tutorials<br>
Seeing: 8/10, transparency 6-7/10, urban light pollution, low 20 day old moon.
<p>
.'))
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