Je,Johann Bayer alizaliwa mwaka gani?
Johann Bayer
Johann Bayer (1572 – 7 Machi 1625) alikuwa mwanasheria na mwanaastronomia kutoka nchi ya Ujerumani. Alianzisha mfumo unaotumika hadi leo wa kutaja mahali pa nyota angani kufuatana na kundinyota na uangavu unaoonekanaMwangaza unaoonekana. Majina ya Bayer hutumiwa kwa nyota angavu zinazoonekana vema kwa macho matupu.
Joseph Haydn
Albert Christoph Dies: (German) , 1810. Full text of the biography by J. Cuthbert Hadden, 1902, from Project Gutenberg. The end of book contains documentary material including a number of Haydn's letters. Alternatively scanned copy at archive.org. in libraries (WorldCat catalog) by Ron Drummond , with biography (in French) , Lecture by Professor Roger Parker, with the Badke Quartet, Gresham College, 8 April 2008 (available for video, audio and text download).