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- It used a heat shield, parachute and retrorockets to slow its descent.
- Like Spirit, Opportunity will be slowed first by a parachute, then retrorockets.
- Its heat shield and retrorockets functioned as expected.
- Biosatellite 1 was not recovered because of the failure of a retrorocket to ignite.
- Using aerobraking means that Mars Odyssey did not need to be fitted with special retrorockets.