NASA'sSolar Terrestrial Probes program (STP) is a series of missions focused on studying the Sun-Earth system. It is part ofNASA'sHeliophysics Science Division within theScience Mission Directorate.[1]
The TIMED (Thermosphere Ionosphere Mesosphere Energetics and Dynamics) is an orbiter mission dedicated to study thedynamics of theMesosphere and LowerThermosphere (MLT) portion of theEarth's atmosphere.[2] The mission was launched fromVandenberg Air Force Base inCalifornia on December 7, 2001 aboard aDelta II rocket launch vehicle.[3]
Hinode, an ongoing collaboration withJAXA, is a mission to explore the magnetic fields of the Sun.[4] It was launched on the final flight of theM-V-7 rocket fromUchinoura Space Center,Japan on September 22, 2006.
STEREO (Solar Terrestrial Relations Observatory) is asolar observation mission.[5] It consists in two nearly identical spacecraft, launched on October 26, 2006.
The Magnetospheric Multiscale Mission (MMS) is a mission to study theEarth'smagnetosphere, using four identical spacecraft flying in atetrahedral formation.[6] The spacecraft were launched on March 13, 2015.
IMAP (Interstellar Mapping and Acceleration Probe) is a heliosphere observation mission. Launched in September 2025, it will sample, analyze, and map particles streaming to Earth from the edges of interstellar space.[7]
