This app lets you say hello to an astronaut on the ISS

By the time you read this story, Samantha Cristoforetti will be getting used to life aboard the International Space Station. The Italian astronaut (the first female Italian astronaut to make it to the ISS) will be 250 miles above Earth's surface, far beyond our ability to see her with our god-given eyes, but not quite far enough that we can't say hello to her.

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