Facts about Enceladus's Water Chemistry
- 10
Dissolved oxygen concentrations in Enceladus's subsurface ocean remain extremely low, suggesting anaerobic metabolic pathways could support potential microbial life if present.
- 09
Carbonate minerals in Enceladus's ocean water indicate chemical equilibrium between the alkaline plume chemistry and dissolved carbon dioxide, constraining the moon's subsurface temperature to roughly 40 to 100 degrees Celsius.
- 08
Magnesium concentrations in Enceladus's ocean water are approximately 0.05 molar, suggesting extensive dissolution of magnesium-rich minerals from the moon's rocky interior.
- 07
Potassium concentrations in Enceladus's subsurface ocean are approximately 40 times higher than in Earth's seawater, indicating intense water-rock interactions at the seafloor.
- 06
Sulfur compounds detected in Enceladus's water plumes by Cassini suggest chemical reactions between the rocky core and ocean water, similar to terrestrial hydrothermal systems.
- 05
Enceladus's ocean water contains dissolved ammonia at concentrations sufficient to lower the freezing point, enabling a liquid ocean despite the moon's extreme distance from the Sun.
- 04
Alkaline pH levels in Enceladus's subsurface ocean, measured around 11 to 12 by Cassini instruments, resemble hydrothermal vent chemistry on Earth's ocean floors.
- 03
Enceladus's subsurface ocean contains silica-rich particles suggesting active hydrothermal vents on the moon's rocky seafloor, detected by Cassini in 2014.
- 02
Enceladus's ocean contains sodium chloride at concentrations roughly equivalent to Earth's seawater, as determined by Cassini's Ion and Neutral Mass Spectrometer analysis.
- 01
Cassini detected organic compounds and molecular hydrogen in Enceladus's water plumes during 2015 flybys, indicating hydrothermal activity.