Red letters and icons like in submarines so your "day mode" vision does not get activated. Here is the astronomical software Stellarium: https://rasc.ca/sites/

Red letters and icons like in submarines so your "day mode" vision does not get activated. Here is the astronomical software Stellarium: https://rasc.ca/sites/default/files/SMP-red.png https://rasc.ca/sites/default/files/SMP-red.png