News Summary Archives Astrobiology Science News 30 January 2008 By Keith Cowing January 30, 2008 Spitzer observations of the Hyades: Circumstellar debris disks at 625 Myr of age, astro-ph Type I planetary migration in a self-gravitating disk, astro-ph Keith Cowing Biologist, Explorers Club Fellow, ex-NASA Space Biologist and Payload integrator, Editor of NASAWatch.com and Astrobiology.com, Lapsed climber, Explorer, Synaesthete, Former Challenger Center board member 🖖🏻 Follow on Twitter