← World catalog MOON / 09
Triton
Neptune
A geologically active captured moon with nitrogen geysers and a possible deep ocean maintained by internal heat.
CEvidence classModel-dependent or indirect interpretation
- Mean radius
- 1,353.4 km
- Surface gravity
- 0.779 m/s²
- Representative temperature
- about −235 °C surface
- Surface pressure
- about 0.014 mbar
Scientific assessment
Voyager 2 established active surface processes, while the interior ocean remains a model-dependent hypothesis awaiting new measurements.
- Liquid-water evidence
- Possible internal ocean, model-dependent
- Principal constraint
- Sparse coverage and no dedicated orbiter
- Principal mission context
- Voyager 2 archive; future mission concepts
Comparative evidence matrix
A transparent research-priority index, not a probability of life. It combines solvent evidence, usable energy, chemistry, environmental stability, evidence maturity, and sampling access.