While working on the Guix Astro update for this month I've learned that the source may be closer than expected (7 libraries share the same VCS, depending on each other).
Other findings - the famous Cosmic microwave background image was produced by the software I'm about to pack - HEALPix.
https://www.esa.int/ESA_Multimedia/Images/2018/07/Planck_s_view_of_the_cosmic_microwave_background