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Delta rocket  The Delta 4 Heavy (there are five configurations of Delta 4, of which this is the largest) can lift up to 13,130 kg/28,950 lb. | US rocket used to launch many scientific and communications satellites since 1960. Its design is based on the Thor ballistic missile. Several increasingly powerful versions have been produced as satellites became larger and heavier. Solid-fuel boosters were attached to the first stage of the rocket in order to increase lifting power. |
| NASA's twin rovers were launched to Mars in June and July 2003 atop a Delta II rocket. Delta II, Delta III, and Delta IV series vehicles are all now in active use. |
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