Planetary science: Enceladus' hot springs

@article{Tobie2015PlanetarySE,
  title={Planetary science: Enceladus' hot springs},
  author={Gabriel Tobie},
  journal={Nature},
  year={2015},
  volume={519},
  pages={162-163}
}
  • G. Tobie
  • Published 12 March 2015
  • Geology, Physics
  • Nature
The detection of silicon-rich particles originating from Saturn's moon Enceladus suggests that water–rock interactions are currently occurring inside it — the first evidence of ongoing hydrothermal activity beyond Earth. See Letter p.207 Hsiang-Wen Hsu et al. have analysed the silicon-rich, nanometre-sized dust stream particles in the Saturnian system using the Cosmic Dust Analyser (CDA) onboard the Cassini spacecraft. With the help of experiments and modelling, the particles are interpreted… 
Low-mass nitrogen-, oxygen-bearing, and aromatic compounds in Enceladean ice grains
Saturn’s moon Enceladus is erupting a plume of gas and ice grains from its south pole. Linked directly to the moon’s subsurface global ocean, plume material travels through cracks in the icy crust
The pH of Enceladus’ ocean
Key Technologies and Instrumentation for Subsurface Exploration of Ocean Worlds
In this chapter, the key technologies and the instrumentation required for the subsurface exploration of ocean worlds are discussed. The focus is laid on Jupiter’s moon Europa and Saturn’s moon
3D Printed Minerals as Astrobiology Analogs of Hydrothermal Vent Chimneys.
TLDR
The results from these efforts to reconstruct a simplified chimney structure directly out of mineral powder using binder jet additive manufacturing suggest that the 3D printing technique may be a valuable tool for future astrobiology research on hydrothermal vent precipitates.
Analogue spectra for impact ionization mass spectra of water ice grains obtained at different impact speeds in space.
TLDR
It is shown that the analogue experiment can reproduce impact ionization mass spectra of ice grains obtained over a wide range of impact speeds, aiding the quantitative analyses ofmass spectra from space.

References

SHOWING 1-10 OF 10 REFERENCES
Ongoing hydrothermal activities within Enceladus
TLDR
Analysis of silicon-rich, nanometre-sized dust particles (so-called stream particles) that stand out from the water-ice-dominated objects characteristic of Saturn indicate ongoing high-temperature (>90 °C) hydrothermal reactions associated with global-scale geothermal activity that quickly transports hydroThermal products from the ocean floor at a depth of at least 40 kilometres up to the plume of Enceladus.
Composition of Saturnian Stream Particles
TLDR
During Cassini's approach to Saturn, the Cosmic Dust Analyser discovered streams of tiny high-velocity dust particles escaping from the saturnian system, which implies that the particles are impurities from the icy ring material rather than the ice particles themselves.
A salt-water reservoir as the source of a compositionally stratified plume on Enceladus
TLDR
Whereas previous Cassini observations were compatible with a variety of plume formation mechanisms, these data eliminate or severely constrain non-liquid models and strongly imply that a salt-water reservoir with a large evaporating surface provides nearly all of the matter in the plume.
Follow the plume: the habitability of Enceladus.
TLDR
The science goals that would motivate an Enceladus mission are more advanced than for any other Solar System body, and the goals of such a mission must go beyond further geophysical characterization, extending to the search for biomolecular evidence of life in the organic-rich plume.
An off-axis hydrothermal vent field near the Mid-Atlantic Ridge at 30° N
Evidence is growing that hydrothermal venting occurs not only along mid-ocean ridges but also on old regions of the oceanic crust away from spreading centres. Here we report the discovery of an