



 
Jeff, First off, the Andromeda galaxy is 2,500,000 ly, not 2,500,000 million ly from here. How many zeros in the corrected _problem_ depends on whether you count only the seven actually shown, or if you imagine the "billion" replaced by nine more zeros (for a total of 16) However, the product (1.625 *10^{19}) should be written as Good Hunting!
 


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