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symbo symbo
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Posts: 1970
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7 years ago
In 2012 A.D., an inhabitant of a planet orbiting a distant star observes the flash of the first nuclear explosion on the Earth, which occurred in July 1945.  Approximately how far away is his solar system from the Earth?
   A)  219 pc    B)  20.6 pc    C)  About 0.07 pc    D)  2.06 pc
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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papachulopapachulo
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7 years ago
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symbo Author
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6 years ago
Thanks for answering, I'll share this with my classmates too
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