This image shows the string of fragments of Comet Shoemaker-Levy 9 that later im

Question

This image shows the string of fragments of Comet Shoemaker-Levy 9 that later impacted Jupiter in 1994. Also shown are crater chains on Earth's moon and Ganymede believed to be due to fragmented comet impacts. What is thought to be responsible for the breakup of a comet body prior to impact?

a. tidal forces on the comet by the target body

b. friction forces due to the comet's high entry speed into the atmosphere of the target body    

c. a collision with a moon of Jupiter

d. a deflector-beam malfunction in the target body's defense network

e. a collision between the comet and a meteoroid shortly before impact

Explanation / Answer

This image shows the string of fragments of Comet Shoemaker-Levy 9 that later im

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