I believe the answer is D. The NASA mission which sent a probe to collide with a comet's nucleus is the Deep Impact. It is the first mission sent in order to see the interior of a comet. The comet that was aimed was called the Comet Tempel 1.
Answer:
The answer is Tm= 2.pi.r / Vm and Tm is greater than Te.
Explanation:
V = Sqrt (GM/r)
Vm = sqrt (Gme/r)
The time taken by satellite,
Te = 2. pi. r / Ve
Tm = 2 . pi. r / Vm.
Hence, Tm is greater.
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