>A common technique in astronomical photography is to combine a number of
>images, taken around the same time, which results in a target image with
>added clarity. This is called stacking and there exists specialised software
>to do this.

>Does Gimp have the functionality required to do this? Is anyone using Gimp
>for this purpose? If so can you please outline the steps taken?


Maybe in the layers dialogue change each layer mode from 'normal' to 'screen'. 

rich (via gimpusers.com)
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