Astronomische Nachrichten
...that Astronomische Nachrichten, founded by H. C. Schumacher in 1821, is the world's oldest extant astronomical journal?
...that <i id="mwDpM"><b id="mwDpQ"><a href="./Astronomische_Nachrichten" id="mwDpU" rel="mw:WikiLink" title="Astronomische Nachrichten">Astronomische Nachrichten</a></b></i>, founded by <a href="./Heinrich_Christian_Schumacher" id="mwDpY" rel="mw:WikiLink" title="Heinrich Christian Schumacher">H. C. Schumacher</a> <i id="mwDpc">(pictured)</i> in 1821, is the world's oldest extant <a href="./Astronomy" id="mwDpg" rel="mw:WikiLink" title="Astronomy">astronomical</a> <a href="./Academic_journal" id="mwDpk" rel="mw:WikiLink" title="Academic journal">journal</a>?