News Archives Astrobiology News 23 August 2006 By Keith Cowing August 23, 2006 Sulfur signature changes thoughts on atmospheric oxygen, Pennsylvania State University Microscopic Passengers to Hitch Ride on Space Shuttle, NASA ARC HD3651B: the first directly imaged brown dwarf companion of an exoplanet host star, arXiv.org Hubble Space Telescope Observations of Comet 9P/Tempel 1 during the Deep Impact Encounter, arXiv.org On the Search For Transits of the Planets Orbiting Gl 876, arXiv.org Keith Cowing SpaceRef co-founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber. Follow on Twitter