“an exceptionally luminous galaxy more than 13 billion years in the past”
Meaning it’s more than 13 billion light years away, a light year being the *distance” light travels in a year at its speed of 186,000 miles/second. One light year works out to about 5.9 TRILLION miles. So 13 BILLION x 5.9 TRILLION is how far away this thing is in miles.
Or 76.7 x 1,000,000,000 x 1,000,000,000,000 Miles
Farther than the farthest star?...........maybe not:
http://science.nasa.gov/science-news/science-at-nasa/2009/28apr_grbsmash/
Except we ain't where we was 13 billion years ago.