News Archives Astrobiology News 6 October 2006 By Keith Cowing October 7, 2006 A limit on the presence of Earth-mass planets around a Sun-like star, arXiv.org New brown dwarfs in Upper Sco using UKIDSS Galactic Cluster Survey science verification data, arXiv.org Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter