Program archive

Solar Terrestrial Probes

Solar Terrestrial is explored here through 3 archived missions, from STEREO through IMAP, with the program’s spacecraft, people, milestones, and source-backed history connected along the way.

Missions: 3
People: 0
Vehicles: 3

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Solar Terrestrial Probes spacecraft

3 mission-specific spacecraft and test articles, plus 0 launch systems and shared hardware records.

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Geospace and heliophysics spacecraftMarch 12, 2015

Magnetospheric Multiscale spacecraft constellation

Magnetospheric Multiscale spacecraft constellation supported the Magnetospheric Multiscale mission with about 3,000 pounds (1,360 kilograms) per observatory flight elements.

Solar and heliophysics observatoryOctober 26, 2006

STEREO spacecraft pair

STEREO spacecraft pair supported the STEREO mission with a launch mass of about 1,360 pounds (620 kilograms) per spacecraft.

Heliosphere-mapping and space-weather observatorySeptember 24, 2025

IMAP observatory

IMAP observatory launched at 1,984 pounds (900 kilograms) under NASA Goddard Space Flight Center and Johns Hopkins University Applied Physics Laboratory.