NASA Autonomous Lander Hovers in Midair, in Infrared Video

Hovering landers or drones look as though they're suspended in the air, because you can't see the vortices caused by the propellers or the heat emitted by the thruster, or whatever mechanism enables the hovering. Well, here you can. And it proves that the act of hovering is anything but delicate. » 6/25/11 10:00am 6/25/11 10:00am