Astronauts simulate deep-space mission in underwater lab

July 25, 2014 9:39 PM

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Astronauts simulate deep-space mission in underwater lab

Plenty of astronauts practice spacewalks in the water, but a crew currently living in an underwater lab plans to introduce a surprising twist to its aquatic excursions: They will create a 10-minute communications delay with Mission Control, simulating what speaking with people on Earth could be like in deep space.

The four astronauts participating in the nine-day NASA Extreme Environment Mission Operations (NEEMO) 18 mission will perform underwater "spacewalks" in which they pretend to be on an asteroid far from Earth, where radio communications between the two locales would take minutes, not seconds, as comm...

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