and it’s happening 3.8 billion light years away! I'll go with 3.8x10^9 years, which is consistent with the "one digit precision" 40,000,000,000,000,000,000,000

and it’s happening 3.8 billion light years away! I'll go with 3.8x10^9 years, which is consistent with the "one digit precision" 40,000,000,000,000,000,000,000 kilometers number.