In the billion or so years life has existed on earth, there’s no evidence any species built a nuclear bomb or had large plastic manufacturing or left anything in GEO, all of which we’ve achieved in the last 100 years.
Progressing to that stage this seems unlikely for a planet with life on.
About that yes, but remember that a fully loaded starship in orbit can land on any solid surface in the solar system and return to earth (except for Venus)
Starship’s usable volume is over 100 times that of an Apollo lunar lander.
First colour monitor I had was orange, light orange, dark orange and very dark orange - a CGA laptop from my dads work. I remember Railroad Tycoon Ran with option 5,1,2 but Civilisation would have to wait a few years for the full blown desktop 286 (12Mhz, 1M ram and a full 40MB hard drive!)
Rather ironic that a letter to a group that is about communication can’t use an appropriate technology to communicate.