Multiple Choice
A planetary nebula has a radius of 0.5 pc and is expanding at 20 km/s. What is the approximate age of this planetary nebula? (1 pc is equal to 3*1013 km and 1 year is equal to 3.15*107 seconds.)
A) 240 years
B) 790,000 years
C) 96,000 years
D) 960 years
E) 24,000 years
Correct Answer:
Verified
Correct Answer:
Verified
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