Siril is able to process planetary images (many small images) as well as deep sky images (a few large images with full pre-processing data). Registration is able to automatically align (translation only) planetary images, using DFT, as well as deep-sky images, using PSF on a reference star, as long as the shift between images in not too large. The manual alignment capability makes it also well fitted for amateur astronomers having bad quality images that automatic tools fail to align properly.