这句话的主语是the development,谓语是has given,间接宾语astronomer,直接宾语hope,然后hope后面又跟了一个同位语从句glipses of distant solar system bodies even smaller than pluto will soon be possibly.
of telescopes of greaster power (and) resolution 是修饰the development的,作定语.
全句意思是：拥有更大功率和更高分辨率的望远镜的开发给了天文学家希望,就是他们未来将很可能看到遥远太阳系中的甚至是小于冥王星的天体.