LIGO Gravitational Observatories

These two huge L-shaped structures visible at a very low zoom level are the LIGO (Laser Interferometer Gravitational-Wave Observatory) facilities in Livingston, Louisiana and Hanford, Washington. Each arm of the structures is 4km in length, making them longer than the Stanford Linear Accelerator Centre we visited some time ago here on Google Sightseeing, which is the longest building in the United States. However, the LIGO structures appear to be low concrete tunnels, so aren’t officially buildings. The observatories are an attempt to detect cosmic gravitational waves, the existence of which was predicted by Einstein in 1916. Almost 100…

Read full article »