Unique Telescopes
These two enormous telescopes in Green Bank, West Virginia are unique in the world. In the foreground is the Green Bank Telescope, the world’s largest fully-steerable telescope. At 485-feet high and over 300-feet across, the GBT weighs 17 million pounds. In the background, the 140-foot (43-meter) telescope is the world’s largest polar-aligned telescope.
Credit: NRAO/AUI/NSF
