Herschel, ESA's cutting-edge space observatory, carries the largest, most powerful infrared telescope ever launched. A pioneering mission, it is studying the origin and evolution of stars and galaxies to help understand how the Universe came to be the way it is today. For this purpose Herschel is looking, in far-infrared and submillimetre wavelengths, at objects among the coldest in space. Launched in May 2009 it has already given great results to the scientific community by revealing invisible parts of the universe.
More backgroud information can be found on: http://www.esa.int/SPECIALS/Herschel/index.html