Johann Heinrich von Mädler
Johann Heinrich von Mädler ( May 29 , 1794 , Berlin – March 14 , 1874 , Hannover ) was a German astronomer . 
<triplet> Johann Heinrich von Mädler <subj> May 29, 1794 <obj> date of birth <subj> Berlin <obj> place of birth <subj> March 14, 1874 <obj> date of death <subj> Hannover <obj> place of death <subj> astronomer <obj> occupation