Fishing Boats
Fishing boats lit green off western India, their lamps rigged to pull the catch to the surface, photographed at night from orbit.
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A chain of green lights stands off India's west coast, out in the dark of the Arabian Sea. The green comes from fishing boats. The colour is deliberate: high-intensity lamps draw squid, shrimp, sardines and mackerel toward the surface, into reach of the boats' lines and nets. Behind the boats the coastline is lit gold, with white at the brightest city cores.
One squid boat can carry more than a hundred lamps. A single boat can give off as much light as a house. The photograph was made from the International Space Station, 417 kilometres up. Crews on the station have made hundreds of thousands of images of Earth, used to track how cities spread and to study what artificial light does to the life beneath it.