Henge Docks' unique vertical orientation saves desk space while showcasing the svelte profile of the MacBook Air.

ENGADGET: Henge Docks announces docking stations for MacBook Air, tidies up your desk layout

These wheels help the probe maintain its "attitude", or orientation, in space without needlessly expending fuel by using thrusters to do the same job.

BBC: NEWS | Science/Nature | Asteroid probe 'did touch down'