"3-D Mid-air Holography. Originally developed in Japan, this system utilizes an ionization effect that occurs when a beam of laser light is focused to a point in air. The laser beam itself is invisible to the human eye but, if the intensity of the laser pulse exceeds a threshold, the air breaks down into glowing plasma that emits visible light. The required intensity is achieved by very short, powerful laser pulses – each plasma pixel, or "flashpoint", lasts for only about a nanosecond, but the resulting image appears to last longer due to persistence of vision. As with film and television, the impression of a continuous image is maintained by refreshing the flashpoint pixels." [link to my.opera.com]
Accept now that all you have seen from the day of your birth on the surface of the earth, to the present, and all that you will meet here are wonderful only because the finite mind of man is confused with fragments of evidence, that, from whatever direction we meet them, spring from an unreachable infinity.