National Aeronautics and Space Administration

Operational Missions

Explorers Missions

Medium Class Explorers (MID EX)
ACE | Swift | THEMIS | WISE

Small Explorers (SMEX)
AIM | IBEX | IRIS | NuSTAR | RHESSI (HESSI)

Missions of Opportunity (MO)
CINDI | SUZAKU (ASTRO-E2) | TWINS

Living With a Star Missions

SDO | Van Allen Probes (RBSP)

Solar Terrestrial Probes Missions

MMS | HINODE (Solar-B) | STEREO | TIMED

Past Missions

Explorers Missions

Medium Class Explorers (MID EX)
FUSE | IMAGE | IMP-8 | RXTE (XTE) | WMAP (MAP)

Small Explorers (SMEX)
FAST | GALEX | SAMPEX | SWAS | TRACE

University Class Explorers (UNEX)/STEDI
CHIPS | SNOE

Missions of Opportunity (MO)
HETE-2