This animation shows the orbits of Magnetospheric Multiscale (MMS) mission, a Solar-Terrestrial Probe mission comprising of four identically instrumented spacecraft that will study the Earth's magnetosphere. Note: Animation of MMS mission orbital path. Animator: Walt Feimer (HTSI). Scientist: Charles Petruzzo (NASA/GSFC). Platforms/Sensors/Data Sets: Magnetospheric MultiScale Mission.