Lorentz transformation question

[nhrock3]

"a spaceship goes from Earth to planet x.
then it goes to the moon of planet x.when it reaches the moon it detects a energy pulse
and 1.01 seconds later planet x blows up.
the distance between planet x and its moon is 400 million meters
the speed of the spaceship relatively to planet x and its moon is 0.980c.

A.what is the time difference between detecting the signal and the blowing of planet x
B.what is the meaning of the time difference
C.did the pulse made the planet to blow up or its other wise "

the question is inside the photo

http://i48.tinypic.com/vo5169.jpg

 

[NateD]

A. The time difference between detecting the signal and the blowing of planet x is 1.01 seconds.B. The time difference suggests that the energy pulse detected by the spaceship caused the destruction of planet x.C. The pulse appears to have caused the planet to blow up.