That's why we should deorbit it into a nearby star system...
mount a nuclear rocket moter onto the thing with swivel mount controlled by advanced gyroscopes to control the direction that the scope is poining...Then send it on its way to take some "close-up" pictures of "nearby" extra-solar planets over the next 500 years or so...
Think big. Think outside the box...the only thing that would make such a plan unfeasible would be if the mirror was damaged (well more damaged than its design flaws have already damaged it) or cost (it might be cheaper in 20 years to send a better scope on the same mission instead of trying to retrofit the old one.)
Scott Evil