Two-dimensional tracking would be managed via the existing Move's visual spectrum camera, or by using a display-mounted IR emitter in conjunction with a remote mounted sensor (again, just like the Wii controller).

ENGADGET: Sony patent application reimagines PlayStation Move with ultrasonic capabilities, IR emitters

When we talk about telescopes, we're usually referring to devices that "see" the visual spectrum of light, but astronomers also build telescopes that gather radiation like radio waves and X rays in order to peer deep into outer space.

FORBES: No. 17: The Telescope