Group items tagged

Space D4TC 100 year starship planetary post-planetary interstellar travel

D4TC spaceship human multiplanet impact scenario asteroid space security risk planetary

D4TC human multiplanet scenario space planetary funeral pyre beacon SETI CETI alien communication

declaration EQUATORIAL countries space orbit law legal treaty agreement planetary post-planetary sovereignty geostationary D4TC

D4TC water ice space exploration worlds planetary Europa Jupiter solar system alien life

D4TC Ballard Trigg Canaveral space age time planetary astronaut psychology human non-human

D4TC human multiplanet scenario planetary SETI CETI communication alien space message genome