Workers attach a crane to the protective shipping container mini-stack number 1 two of the observatories for NASA's Magnetospheric Multiscale Observatory.

Workers attach a crane to the protective shipping container to prepare to uncover the lower stack, mini-stack number 1, two of the observatories for NASA's Magnetospheric Multiscale Observatory, or MMS. They were delivered to the Building 2 south encapsulation bay at the Astrotech payload processing facility in Titusville, Florida, near Kennedy Space Center.

The MMS upper stack, mini-stack number 2, is scheduled to arrive in about two weeks. MMS is a Solar Terrestrial Probes mission comprising four identically instrumented spacecraft that will use Earth’s magnetosphere as a laboratory to study the microphysics of three fundamental plasma processes: magnetic reconnection, energetic particle acceleration and turbulence. Launch aboard a United Launch Alliance Atlas V rocket from Space Launch Complex 41 on Cape Canaveral Air Force Station is targeted for March 12, 2015. To learn more about MMS, visit http://mms.gsfc.nasa.gov. Photo credit: NASA/Dan Casper