Friedrich Friedrich Tietjen ( 1832 – Westerstede , Oldenburg -- 1895 Berlin ) was a German astronomer . Friedrich Tietjen ( 1832 , Westerstede , Oldenburg -- 1895 Berlin ) was a German astronomer .
Friedrich Tietjen (1832 - Westerstede, Oldenburg--1895 Berlin) ialah seorang ahli astronomi Jerman. Friedrich Tietjen (1832, Westerstede, Oldenburg-1895 Berlin) ialah seorang ahli astronomi Jerman.