The International Lunar Network or ILN was a proposed network of lunar surface stations to be built by the United States and the other space-faring countries in the 2010s. Each of these stations would act as a node in a lunar geophysical network. Ultimately this network could comprise 8-10 or more nodes operating simultaneously. Each node would have a minimum of two core capabilities. These capabilities include seismic sensing, heat flow sensing, and laser retroreflectors, and would be specific to each station. Because some nodes were planned to be located on the far side of the Moon, NASA would have contributed a communications relay satellite to the project. Individual nodes launched by different space agencies could have carried additional, unique experiments to study local or global lu