A nearby star thought to harbor comets and asteroids now appears to be home to planets, too. The presumed worlds are smaller than Jupiter and could be as tiny as Pluto, new observations suggest. AU Microscopii, also known as AU Mic, is a relatively nearby and common sort of star. And it is young. Things around it are just gathering together out of the leftovers of star formation... In new observations with the Keck Telescope in Hawaii, researchers found clumps in the disk -- strong evidence that planets exist. "We see multiple clumps in the dust disk," said study leader...