Unlike the last landing when the Mars rovers were covered with air bags and bounced to a stop, the Phoenix will land on its three legs. It is expected to enter the Martian atmosphere at 13,000 mph and will hopefully slow down to 5 mph when it reaches the surface and lands, seven minutes later.
"This is not a trip to grandma's house. Putting a spacecraft safely on Mars is hard and risky," said Ed Weiler, associate administrator for NASA's Science Mission Directorate at NASA Headquarters in Washington.

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