| 11. | Fuel requirements could be reduced, if the alternative to braking rockets proves a safe means for landing.
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| 12. | With its arrival, Odyssey will ignite a braking rocket intended to steer the probe into orbit around Mars.
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| 13. | The risky technique involves vehicles dipping into the Martian atmosphere to slow down, rather than firing braking rockets.
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| 14. | A series of six braking rocket firings will drop the craft from a 15.5-mile orbit and slow its descent.
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| 15. | A solid-fueled braking rocket was also added to the parachute lines to provide for a softer landing at touchdown.
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| 16. | A dozen small braking rockets should bring the less than 4-foot-tall lander to a gentle, upright stop on the surface.
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| 17. | On Mission Control's cue, the shuttle pilots fired the braking rockets, sending Endeavour on a long dive out of orbit.
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| 18. | Commands were stored in the craft for four more braking rocket firings that would ease the craft toward the asteroid surface.
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| 19. | Alighting over water rather than land made braking rockets unnecessary, but its disadvantages included difficult retrieval and the danger of drowning.
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| 20. | Without parachutes or braking rockets, the microprobes will dive into the atmosphere, encased in protective shells about the size of basketballs.
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