... News . ... NASA moves longest-serving Mars spacecraft for new observations . ... No NASA Mars orbiter has been in a position to observe morning daylight on Mars since the twin Viking orbiters of the 1970s. NASA/JPL . NASA s Mars Odyssey spacecraft has tweaked its orbit to help scientists make the first systematic observations of how morning fogs, clouds, and surface frost develop in different seasons on the Red Planet. ... NASA's Odyssey spacecraft camera yields most accurate Mars map ever . ...