Astronomy: Timothy Ferris eyes the amateur asteroid-watchers.
By Robin Nelson
Posted 09.23.2002 at 3:17 pm 0 Comments
The discovery of asteroid 2002 NT7, the space rock that astronomers believe could collide with Earth on February 1, 2019, wasn't the worst cosmic news of the summer. More unsettling was the announcement on June 17 that a football-field-size asteroid had whizzed by Earth three days before. It missed us by 750,000 miles—less than a third of the distance to the moon—and had the destructive pop of a nuclear weapon.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.