Adler Planetarium

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Connection to Space Science


NASA Neutral Buoyancy Lab

How do astronauts train on Earth to work in the weightless environment of space? One option is NASA's Neutral Buoyancy Lab! 

NASA's Neutral Buoyancy Lab is a training facility where astronauts achieve neutral buoyancy under water, simulating the weightlessness of space. First, a fully suited astronauts is lowered into a very large pool. Once in the water, they are weighted by support divers. Through a combination of weights and flotations, the astronaut neither sinks nor floats, but "hovers" in the water!

NASA's Neutral Buoyancy Lab helps scientists and engineers design and test for current and future NASA programs.