News Archives Astrobiology Science News 3 December 2009 By Keith Cowing December 3, 2009 Detecting and characterizing extrasolar planetary systems with astrometry: review from the Blue Dots astrometry working group, astro-ph Checking Stability Of Planet Orbits In Multiple-planet Systems, astro-ph Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter