I have not tried this recently and don't know if this will help, but here is a script that, in theory, installs the General Star Catalog. github.com/JerryBlack/buildKstarsNightly...b/main/installgsc.sh This script is extracted from Rob Lancaste's excellent AstroPi3 script github.com/rlancaste/AstroPi3/blob/master/setupDebianSBC.sh chmod +x installgsc.sh to make it executable then run ./installgsc.sh from the the directory in which it resides. requires a relogin/reboot to ensure the environmental variable GSCDAT in /etc/profile is readRead More...