Program archive

Helios

Helios is explored here through 2 archived missions, from Helios 1 through Helios 2, with the program’s spacecraft, people, milestones, and source-backed history connected along the way.

Missions: 2
People: 0
Vehicles: 2

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Currently viewing · Science & Payloads

Helios science and payloads

The instruments, experiments, destinations, and scientific purpose connected to each robotic mission.

Close-Sun heliophysics probeHelios 1Inner heliosphere

Spacecraft: Helios 1 spacecraft
Closest approach: 0.309 astronomical unit (about 47 million kilometers)
Launch vehicle: Titan IIIE-Centaur

Open science record →Close-Sun heliophysics probeHelios 2Inner heliosphere

Spacecraft: Helios 2 spacecraft
Closest approach: 0.29 astronomical unit (about 43 million kilometers)
Launch vehicle: Titan IIIE-Centaur

Open science record →