Planet-Building 'Flying Saucer' Disk Is Surprisingly Cool (Video)

Everyone knows that UFOs are cool, but the surprisingly low temperatures of one cosmic flying saucer may force astronomers to rethink their ideas about how planets form. Scientists have made the first direct measurements of large dust grains in the planet-forming region of a disk dubbed the Flying Saucer, which surrounds a young star in the star-formation region Rho Ophiuchi, about 400 light-years from Earth. The researchers created a video to zoom in on the cosmic Flying Saucer to highligh