世界上最大望远镜之一也是最特殊的Hobby-Eberly望远镜(简称HET),位于美国德克萨斯州西部的McDonald天文台,由美国及德国的大学共同合作制造。Hobby-Eberly与大多数望远镜不同,主镜所对的高度维持在55度,虽然所能观测的天空受到限制,但它能收集的星光几乎与位于夏威夷的双凯克望远镜(twin Keck Reflector)其中任何一个望远镜一样多,而价格及重量却只有一半。由所在的观测地点,Hobby-Eberly望远镜可观测的天空从赤纬-10°至71°的 One of the largest telescopes in the world is also the most distinctive Hobby-Eberly telescope (HET). The McDonald Observatory in western Texas, USA, is a joint effort of universities in the United States and Germany. Hobby-Eberly Unlike most telescopes, the height of the primary mirror remains at 55 degrees and although the observable sky is limited, it can collect almost as much light as the twin Keck Reflector in Hawaii As much as any one telescope, but the price and weight is only half. From the location of the observation, the sky observable by the Hobby-Eberly telescope moves from a declination of -10 ° to 71 °