|
Exposure |
SII
360 min. (12 x 30 min. bin 1x1)
Hα
360 min. (12 x 30 min. bin 1x1)
OIII 300 min. (10 x 30 min. bin 1x1)
Hα
is used
for the luminance
SII,Ha & OIII are mapped
to RGB respectivly
Click
here for a BW Hα
version
Click
here for a natural color version. |
|
Software |
CCDSoft,
CCDStack, Photoshop CS w/ the Fits Liberator plugin, Noel Carboni's actions
and Russell Croman's GradientXTerminator
CCDStack to calibrate, register,
normalize, data reject & combine.
PhotoShop for
non-linear stretching and color combine.. |
|
Comment |
North is to the top.
The colors in the top
image follow the spirit of the Hubble Palette. The lower two images use
the same filter mapping but great liberties were taken with the
channel levels and hues of individual colors.
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.
Source: NASA
APOD |
