1. Because it will be out of radio contact with Earth throughout the descent, the spacecraft will operate on pre-programmed instructions during the final minutes before landing. 2. The spacecraft operates mainly on solar-generated electricity. 3. The spacecraft is operating by commands that were stored in its computer a month ago. 4. With one remotely controlled spacecraft operating just inches from another at times, the sortie was unprecedented in the annals of human spaceflight. |
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