ensch rift ▁für ▁Astronom ie , ▁x vi . ▁ 2 0 7 ▁( account ▁of ▁early ▁years ▁by ▁E ▁He is ); ▁ ▁External ▁links ▁▁ ▁Award ing ▁of ▁R AS ▁gold ▁medal , ▁ 1 8 4 2 : ▁M NR AS ▁ 5 ▁( 1 8 4 2 ) ▁ 1 5 8 ▁ ▁Award ing ▁of ▁R AS ▁gold ▁medal , ▁ 1 8 6 0 : ▁M NR AS ▁ 2 0 ▁( 1 8 6 0 ) ▁ 1 5 4 ▁ ▁Port ra its ▁of ▁Peter ▁Andreas ▁Hans en ▁from ▁the ▁L ick ▁Observ atory ▁Records ▁Digital ▁Archive , ▁U C ▁Santa ▁Cruz ▁Library ' s ▁Digital ▁Col lections ▁ ▁Ob itu aries ▁▁ ▁AN ▁ 8 3 ▁( 1 8 7 4 ) ▁ 2 2 5 / 2 2 6 ▁▁ ▁M NR AS ▁ 3 5 ▁( 1 8 7 5 ) ▁ 1 6 8 ▁ ▁Category : 1 7 9 5 ▁birth s ▁Category : 1 8 7 4 ▁death s ▁Category : Dan ish ▁astronom ers ▁Category : G erman ▁astronom ers ▁Category : Dan ish ▁mathemat icians ▁Category : G erman ▁people ▁of ▁Dan ish ▁descent ▁Category : M embers ▁of ▁the ▁Royal ▁Swedish ▁Academy ▁of ▁Sciences ▁Category : Re cip ients ▁of ▁the ▁Gold ▁Medal ▁of ▁the ▁Royal ▁Astronom ical ▁Society ▁Category : Re cip ients ▁of ▁the ▁C ople y ▁Medal ▁Category : Pe ople ▁from ▁the ▁Duch y ▁of ▁Schles wig ▁Category : Pe ople ▁from