Comment by rtkwe

There's a lot of limitations with an on orbit satellite you don't run into with ground based systems. Hubble is pretty old and it's mirror pretty small at this point so there are hard limits on it's usefulness for viewing very faint objects, it's mirror simply doesn't gather as much light because it's relatively small at just under 8 feet. Another thing you can't do anywhere nearly as easily are upgrades or adding new experiments. With ground based telescopes it's relatively easy to add new experiments on the side mirror to measure new spectra or measure in a different way. That just can't be done with a space based telescope, even if the design allowed for it the costs sky rocket.