Johann Holetschek
Johann Holetschek (29 August 1846 in Thuma – 20 November 1923 in Vienna) was an Austrian astronomer, known for his research on comets. Born in Thuma, in Lower Austria, he worked at the observatory of the University of Vienna. He died at Vienna. The crater Holetschek on the Moon is named after him. Sources All About Austria 19th-century Austrian astronomers 1846 births 1923 deaths Discoverers of comets 20th-century Austrian astronomers People from Waidhofen an der Thaya District Academic staff of the University of Vienna University of Vienna alumni