OLD MARS SPACECRAFT LEARNS NEW TRICKS

摘要

NASA's Mars Odyssey spacecraft, unched in 2001, is the longest-ipacecraft sent to the Red Planet (see photo). Yet neither Odyssey nor any other Mars orbiters have flown in a trajectory with a view of the ground in morning daylight. Scientists recently tweaked the Odyssey's orbit to enable it to make the first systematic observations of how morning fogs, clouds, and surface frost develop during the planet's different seasons.