Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Pathfinder is scheduled to land on July 4th and Global Surveyor due to enter orbit in September. These Hubble Space Telescope images from March 1997 show the Northern Hemisphere in early Martian summer , with a receding polar cap and whitish water-ice clouds. Martian weather reports will play an important role in mission planning. Both spacecraft rely on the Martian atmosphere for braking maneuvers and Pathfinder's lander and rover are solar powered.
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