According to Google the Amazon river is the longest and the Nile is the second longest
I think the answer may be a cold front not sure trying to help out
U.S. helped Vietnam in the war for the reunification of vietnam
Answer:
If a star explodes 15 Light Years away, we will see the explosion 15 years from now. If it's 100 light years away, 100 years and so on and so on.
