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02 / Beneath the Giant

Magnetic Cathedral

Ganymede · Expedition 008
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Ganymede · Expedition 008

Listen beyond your own noise.

Nia leads Mara through grooved ice to a silent aurora observatory. Leave a reference instrument with Mara, compare the western and eastern terraces, and track down equipment interference. Open the high route, observe the aurora, collect Mara and return together.

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Nia / Mara / Sol on relay

Arrows / WASD or the direction pad to walk. Tap the ground to choose a route. Space / the large button performs the named action.

Checkpoints last for this visit. Reentering starts a new journey.

The real destination

The station, crew, compressed valley, field vectors, coil interference and illuminated field traces are authored models. This local survey is not a reconstruction of the observations used to infer Ganymede’s ocean.

NASA · destination facts

Pause

Field journal

Your route and field observations

The real destination

Ganymede is the only moon known to have its own magnetic field. Its aurora responds to its magnetic environment; observations of the aurora support a salty ocean beneath the ice. Bright grooved terrain and older dark terrain record different surface histories.

ganymede spacecraft image
Spacecraft photograph · NASA / JPL-Caltech / SwRI / MSSS

The station, crew, compressed valley, field vectors, coil interference and illuminated field traces are authored models. This local survey is not a reconstruction of the observations used to infer Ganymede’s ocean.

NASA · destination facts

Ganymede · Expedition 008

The quiet was something we made.

You kept a reference, removed a local source of noise, compared both sides of the valley and returned for Mara. The aurora offered evidence, not a translated message. The crew turns next to Callisto’s ancient impact landscape.

Continue · The Oldest Witness