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Live video from the International Space Station
It includes internal views when the crew is on-duty, and Earth views at other times. The video is accompanied by audio of conversations between the crew and Mission Control. This video is only available when the space station is in contact with the ground. During "loss of signal" periods, viewers will see a blue screen. Since the station orbits the Earth once every ninety minutes, it experiences a sunrise or a sunset about every forty-five minutes. When the station is in darkness, external camera video may appear black, but can sometimes provide spectacular views of lightning or city lights below. (Source: NASA / Ustream): http://tinyurl.com/ckwxer7