Neutral Buoyancy
Two astronauts wearing white suits float in a large tank of water

Two astronauts work in NASA's Neutral Buoyancy Laboratory near NASA's Johnson Space Center in Houston, Texas. Image Credit: NASA

      the state of keeping a person or thing under water from sinking or floating, using weights or floats

The Neutral Buoyancy Laboratory is a pool filled with over a million gallons of water.

Working in the neutral buoyancy laboratory helps astronauts train for spacewalks.

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