Introduction
Siril that is meant to be Iris for Linux (sirI-L), is a powerful astrophotographic image processing application.
Installation
Standard
Install the following package: siril.
From external PPA
The latest version of Siril could not be available in the default Ubuntu repositories. To install it, add the ppa:lock042/siril repository, through the Software & Updates app or via the command line:
sudo apt-add-repository ppa:lock042/siril
External Links
Siril Tutorials