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Why NASA’s GRACE-1 and GRACE-2 satellites ended their operations? 
  • a)
    They had better options
  • b)
    It occupied more space station slots
  • c)
    Due to the lack of scientists
  • d)
    Due to failure of several battery cells
  • e)
    Due to operation failure
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Why NASA’s GRACE-1 and GRACE-2 satellites ended their operations...
Answer – 4. Due to failure of several battery cells
Explanation

NASA’s GRACE-1 and GRACE-2 satellites ended operations after experiencing problems due to failure of several battery cells. NASA said that, the Gravity Recovery and Climate Experiment (GRACE) mission, carried out in cooperation with the German space agency DLR, had ended science operations after the retirement of one of its twin spacecraft GRACE-1 and GRACE-2. The satellites had been experiencing problems due to failure of several battery cells, which caused a loss of contact recently. GRACE-2 is expected to reenter in December 2017 or January 2018.
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Why NASA’s GRACE-1 and GRACE-2 satellites ended their operations?a)They had better optionsb)It occupied more space station slotsc)Due to the lack of scientistsd)Due to failure of several battery cellse)Due to operation failureCorrect answer is option 'D'. Can you explain this answer?
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