It pains me to look back on my efforts of only about six months ago as shown above. Here's a reworking, using exactly the same original data, but now with full-fat star colour and my preferred homegrown recipe for dealing with the hydrogen-alpha emission:
The Heart Nebula - IC1805
I've also taken the opportunity to orient the image "north up" this time around. A 2048x2048 pixel version is available here
. Processing followed almost exactly the same recipe I used with my "Astronomy Picture of the Day" Soul Nebula
image so I was able to replace the nebulosity and star image components in the "Soul Nebula" Photoshop stack and perform only the most minor tweaks, a great time saver and something that finally allows me to say I've found my "house-style". Update:
If you are using the Firefox browser then try right-clicking on the image and selecting "View Image", the first option. That gets rid of the astro-unfriendly light background of the forum. When you are done then click the "Back" button to get back to the forum. If you are using IE then shame on you.