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If the sun were to burn out, it would take humans just over 8 minutes to realize because light from the sun takes just over 8 minutes to reach earth. Tommy was 3 years old when his dad showed him a particular star that was estimated to be 18 light years away from earth. If the star burned out immediately after Tommy was showed it, how old would Tommy be before he realized the star was gone?
A) 21 years old
B) 18 years old
C) 9 years old
D) 6 years old
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