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NEEMO

NEEMO - the NASA Extreme Environment Mission Operations project - is a NASA analog mission that sends groups of astronauts, engineers and scientists to live in Aquarius, the world's only undersea research station, for up to three weeks at a time. 

Aquanaut underwater working on a small machine in front of metal rigging.
Photo of astronaut crew headed out on a boat to Aquarius Habitat for NEEMO).
Photo of astronaut crew headed out on a boat to Aquarius Habitat for NEEMO)
Photo of astronaut crew undersea with Aquarius Habitat in background
NEEMO
NEEMO 22 diver collecting coral research samples
NEEMO 16 aquanauts Kimiya Yui and Tim Peake pose with their support diver and astronaut Mike Gernhardt in the DeepWorker...
NEEMO 16 aquanauts Kimiya Yui and Tim Peake pose with their support diver and astronaut Mike Gernhardt in the DeepWorker single-
Aquanaut Steve Squyres (Cornell University) gets a close-up as he and his fellow NEEMO 16 crew members swim past the...
Close-up View of the Aquarius Habitat
NEEMO 18 crew waste little time in performing experiments and other assignments
NASA astronauts take a Psychomotor Vigilance Task (PVT) test while doing simulated space maneuvers on the ocean floor during NEEMO...
Psychomotor Vigilance Task (PVT) test
This photograph of NASA astronaut Serena Aunon (@AstroSerena) moving tools and equipment underwater was taken during the NASA Extreme Environment...
NASA astronaut and NEEMO 20 aquanaut Serena Aunon moves equipment underwater during the 14-day undersea mission.
NEEMO 16 Commander Dottie Metcalf-Lindenburger (NASA) takes the plunge to kick off Mission Day 1.
Taking the Plunge on NEEMO 16 Mission Day 1
NEEMO 15 Commander Shannon Walker (NASA) and fellow aquanaut David Saint-Jacques (Canadian Space Agency) use a small telescoping boom as...
NEEMO 15
KENNEDY SPACE CENTER, FLA. -- The NASA Extreme Environment Mission Operations (NEEMO) team is ready to begin their 17-day undersea...
KENNEDY SPACE CENTER, FLA. - A dive boat is moored to the Life Support Buoy, anchored above the NOAA undersea...
KENNEDY SPACE CENTER, FLA. - In the water offshore from Key Largo, site of the NASA Extreme Environment Mission Operations...
KENNEDY SPACE CENTER, FLA. - In the water for a practice dive in the ocean offshore from Key Largo is...
KENNEDY SPACE CENTER, FLA. - Ready for another dive to the NOAA undersea station Aquarius, offshore from Key Largo, the...
KENNEDY SPACE CENTER, FLA. - The boat with NEEMO-6 personnel ties up at the dock in Key Largo after a...