http://www.scienceray.com/Physics/Ion-Propulsion-From-Star-Trek-to-NASA.115601 Discussion about: Ion Propulsion: From Star Trek to NASA http://www.scienceray.com/Physics/Ion-Propulsion-From-Star-Trek-to-NASA.115601#comment93760 ]]> Mon, 28 Jan 2008 16:49:13 PST http://www.scienceray.com/Physics/Ion-Propulsion-From-Star-Trek-to-NASA.115601#comment93758 ]]> Mon, 28 Jan 2008 16:48:28 PST http://www.scienceray.com/Physics/Ion-Propulsion-From-Star-Trek-to-NASA.115601#comment93757 ]]> Mon, 28 Jan 2008 16:47:16 PST http://www.scienceray.com/Physics/Ion-Propulsion-From-Star-Trek-to-NASA.115601#comment45983 ]]> Thu, 11 Oct 2007 02:05:22 PST http://www.scienceray.com/Physics/Ion-Propulsion-From-Star-Trek-to-NASA.115601#comment45895 ]]> Wed, 10 Oct 2007 19:15:15 PST http://www.scienceray.com/Physics/Ion-Propulsion-From-Star-Trek-to-NASA.115601#comment45794 ]]> Wed, 10 Oct 2007 15:06:05 PST