Inspecting the GBT Track
The Green Bank Telescope was constructed in the 1990s, beginning with its huge circular track and support. In this photo, contract engineers are inspecting one of the GBT’s four trucks that drive the 17-million pound telescope in a circle. Each truck has four wheels, meaning each wheel supports one million pounds. The track goes 25 feet into the ground to remain sturdy and level. Metal covers in between the trucks protect the track from snow and dirt.