Zero G flight testing NASA SPHERES (<a rel="nofollow" class="external free" href="http://www.nasa.gov/spheres">http://www.nasa.gov/spheres</a>)
NASA Ames Research Center
<a rel="nofollow" class="external free" href="https://www.nasa.gov/centers/ames/images">https://www.nasa.gov/centers/ames/images</a>