|
CCD
Imaging
Numerical Integration
Cosmic
Theories
About
|
|
Planetary Nebulae Images
|
 |
NGC 7009 12/10/2006
NGC7009 is a planetary nebula. It's distance is uncertain with
estimates in the range 2000 - 3900 ly. It is known as the Saturn Nebula
for obvious reasons.
8" LX200, f/10, Meade DSI, 20x30sec exposures. Aligned and stacked in
Registax with x2 expansion. Max Entropy deconvolution in Astroart. Lots
of gamma and contrast enhancement in PSP.
|
| |
|
|
 |
NGC 6818 12/10/2006
NGC 6818 is a planetary nebula about 6000ly away. It is
sometimes called The Little Gem.
8" LX200, f/10, DSI, 20x30secs. Aligned and stacked with
x2 expansion and wavelet filters in Registax. Contrast adjustment in
PSP.
|
| |
|
 |
M57 13/6/2004
M57 is probably the best known planetary nebula and is known as the
Ring Nebula. It is the remains of an exploded star about 2300ly away.
The explosion probably took place 6-8000 years ago.
8" LX200 F10, MX5-C camera, 20 x 20sec exposures each captured,
calibrated (dark frame), colour converted, colour plane aligned and
stacked using Maxim DL. Histogram and contrast enhancement in PSP. The
'scope was AltAzi mounted at the time giving rise to the 'egg-shaped'
stars.
|
| |
|
 |
M27 20/8/2006
M27, known as the Dumbell Nebula was the first planetary nebula
to be discovered. It is about1,250 ly away and is the remains of a stellar
explosion about 48k years ago. The central blue star is clearly seen.
8" LX200 f/6.3 reducer, Meade DSI, 20x30secs, 'soft' and
'high gain'. Uncombined images saved then stacked in Maxim using manual
centroid align and 'sum'.
|
| |
|
|
 |
NGC 2392 - Eskimo Nebula
Aslso known as the Clownface Nebula. This planetary nebula is about
3000 ly away. At least two of its multiple shells can be seen here.
8" LX200 f/10, DSI, about 30 images at 20secs combined in Maxim DL.
Lots of Gamma applied to show up the outer shell.
|
|
