Q:
A: Jena is a town in central Germany on the River Saale. With a population of 102,442 (as of 31 December 2004) it is the third biggest town in the federal state of Thuringia. There are so many things to see and do there. There is a star observatory there. Today Jena is a manufacturing city, specializing in precision machinery, pharmaceuticals, optics and photographic equipment, and is home to the famous Zeiss optics plant. In 1926 the world's first modern planetarium was built by the Zeiss company in the Damenviertel district of the town. Today the city's economy diversifies into bioinformatics, biotechnology, software and photonics. The metropolitan area of Jena is among Germany's 50 fastest growing regions.