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SESK: Stuff Everyone Should Know · sesk.info/astro-enceladus-ocean-plumes

What do Enceladus's south-polar jets spray into space?

Icy particles and vapor from a subsurface salty ocean.

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  1. Material from a subsurface ocean ✔
  2. Lava from a metallic core
  3. Gas captured from the Sun

Why: Cassini found that Enceladus hides a global liquid-water ocean beneath its crust. Jets continuously eject icy grains, water vapor, and simple organic chemicals from that ocean.

Huh, didn't know that: Some plume material escapes Enceladus and supplies Saturn's diffuse E ring.

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Enceladus is an ocean world with a serious sprinkler setting.
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References

Answer: Material from a subsurface ocean. Cassini found that Enceladus hides a global liquid-water ocean beneath its crust. Jets continuously eject icy grains, water vapor, and simple organic chemicals from that ocean.

  1. Enceladus science.nasa.gov/mission/cassini/science/enceladus
    Enceladus is an active moon that hides a global ocean of liquid salty water beneath its crust.
    Checked 2026-10-10.

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