News Archives Astrobiology Science News 5 June 2009 By Keith Cowing June 5, 2009 Gifts from Exoplanetary Transits, astro-ph Constraining the Porosities of Interstellar Dust Grains, astro-ph The dynamical role of the circumplanetary disc in planetary migration, astro-ph Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter