Cameras on NASA exoplanet spacecraft slightly out of focus, Space News “NASA confirmed July 26 that the focus of the four cameras on the Transiting Exoplanet Survey Satellite (TESS) spacecraft will drift when the spacecraft cools to operating temperatures after launch next March. The problem was noticed in recent tests when the cameras were chilled to approximately -75 degrees Celsius. “Recent tests show the cameras on TESS are slightly out […]