National Aeronautics and Space Administration

Operational Missions

Explorers Missions

Medium Class Explorers (MID EX)
ACE | ICON | Swift | TESS | THEMIS

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

Missions of Opportunity (MO)
GOLD | NICER

Living With a Star Missions

PSP | SDO | SET-1 | Solar Orbiter

Solar Terrestrial Probes Missions

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

Past Missions

Explorers Missions

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

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

University Class Explorers (UNEX)/STEDI
CHIPS | SNOE

Missions of Opportunity (MO)
CINDI | HETE-2 | SUZAKU (ASTRO-E2) | TWINS

Living With a Star Missions

Van Allen Probes (RBSP)