NOVA: "EARTH FROM SPACE"
PBS, 9:00 p.m. ET
Tonight’s new installment is called Earth From Space, and takes a long look (especially in terms of distance) at our planet, and its ecosystem, to show how closely everything is related. Also related: Since most TV signals these days are transmitted via satellite, it’s fair to say that if you tune in tonight, you’ll be watching Earth from Space… from space. Check local listings.