SpaceX launch: X-37B space plane mission hits 600 DAYS – what we know of secret mission X-37B – a military space plane blasted into orbit by a SpaceX Falcon 9 rocket – has now surpassed its 600th day on its top-secret space mission. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:SpaceX launch: Dragon cargo spacecraft launches on pre-flown Falcon 9 rocketBritish space mission to salvage cosmic junk successfully blasts offNow Read This: Discussion Questions for the PBS NewsHour-New York Times Book Club’s April Pick: ‘The Death and Life of the Great Lakes’Supergiant NINE BILLION light years away is the furthest star ever discoveredALIEN BREAKTHROUGH: Shock study boosts hopes there is life on other planetsNonfiction: A Reckoning With an Imperfect Science in ‘Blue Dreams’