John Couch Adams History: July 10, 1847 - Urbain J J Leverrier and John Couch Adams, codiscoverers of Neptune meet for 1st time at home of John Herschel July 3, 1841 - John Couch Adams decides to determine position of an unknown planet by irregularities it causes in the motion of Uranus June 5, 1819 - John Couch Adams, English astronomer, co-discover Neptune