(Christian Science Monitor) — Five hundred miles into the cold universe, at the cusp of sky, two satellites tumble into orbit, guided by the background light of stars – a remarkable sight, no doubt. What’s more remarkable still is the country that rocketed them up there: Nigeria. Earth’s least likely space-going nation reached further into the stars last week, when Nigeria shot its third and fourth satellites into orbit, including the first satellite built by Africans. From their exospheric perch, the two will map one of humanity’s final frontiers: Lagos. The vast megalopolis, home to between nine and 17 million people, is a constantly-shifting phenomenon in urban non-planning.