Multiple Choice
The Type II supernova that created the Crab Nebula (image below) was seen by Chinese and Arab astronomers in the year A.D.1054.Because the star is 6,500 light-years away from us,we know the star exploded in the year: 
A) A.D. 7554.
B) A.D. 1054.
C) 5446 B.C.
D) 7554 B.C.
Correct Answer:
Verified
Correct Answer:
Verified
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