NASA and the European Space Agency have tested a prototype system that could truly give new meaning to long-distance calling. It could help enable Internet-like communications between Earth and other planets. To demonstrate very long-distance remote control, ISS Commander Sunita Williams last month conducted an experiment that used NASA's Disruption Tolerant Networking protocol to drive a Lego robot located on Earth at the European Space Operations Center in Germany. Unlike other types of communication, DTN is not built around direct line of sight.
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