Hard to put a price on astroscience or cosmology. Hubble was just recently assisting in the search for the very first discovered exo-moon. http://earthsky.org/

Hard to put a price on astroscience or cosmology. Hubble was just recently assisting in the search for the very first discovered exo-moon. http://earthsky.org/space/1st-exomoon-neptune-sized-kepler-1625b-hubble http://earthsky.org/space/1st-exomoon-neptune-sized-kepler-1... In the mid-1990s, after Hubble had its optics corrected, researchers were already planning its successor. The catch phrase in NASA at the time was “faster, better, cheaper.” JWT was announced in 1996 to a standing ovation, yet it's current planned launch is due 25 years after that announcement. (note that it's infrared, not optical)