"Detecting Alien Planet Particles Smaller than a Human Hair"

"Detecting Alien Planet Particles Smaller than a Human Hair" --New SETI Breakthrough: "It may sound like science fiction, but astronomers have worked out a scheme that will allow them to detect and measure particles ten times smaller than the width of a human hair, even at many light-years distance. They can do this by observing a blue tint in the light from far-off objects caused by the way in which small particles, no more than a micron in size (one-thousandth of a millimeter) scatter light."