The upper stage slams down, sending 2.2 million pounds of lunar soil-and perhaps ice-into space. (Amateur astronomers with 10-inch telescopes will be able to see the massive dust plume.) The resulting moon divot could be up to 16 feet deep and 100 feet wide. And because the upper stage will have burned all its fuel during its climb into space, none of it will contaminate observations of the cloud´s contents.
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.