3 ms·Just advertise for telescope enthusiasts.by muthdra 5y agoJust advertise for telescope enthusiasts.cbanek 5y agoNow I'm thinking telescope + QR code on the moon, who knows, maybe it'd be a set of lights that could generate QR codesahevia 5y agoIf I see this being done within my lifetime I know now which HN poster to blamedeleted 5y ago[deleted]