I had always wondered about the software for the treatment of digital images that the astronomers use. I admit that I am a novice in the matter, but IRIS seems to be the answer. This extraordinary standalone of French fashion that can operate from a rar, has a such quantity of complex tools of treatment of astronomical images that, it does not fit me doubt, it will be the favorite of the passionate observers of the firmament. Their gratuitousness and versatility increase their attractiveness notably.