Without geeking it out too much, there's an equation that deals with resolution and pixellation vs. Distance. Dame basic principle as why, no matter how perfect the optics, a geosynchronous imager can't resolve past a certain size.
wow...this is awesome. This is the first image that came up for "hcp telescope". Honest, do a search yourself.
Congrats! That is what is called a mnemonic device! Now you'll always remember how to pronounce touche'