Two mass spectrometers onboard the Cassini spacecraft, the Cosmic Dust Analyzer (CDA) and the Ion and Neutral Mass psecrometer (INMS), performed compositional in situ measurements of material emerging from the subsurface of Enceladus. These measurements were made inside both the plume and Saturn's E ring, which is formed by ice grains escaping Enceladus' gravity [1.1% of Earth's gravity]....Basically the spacecraft detected carbon-containing space dust with maybe a little hydrogen in it. Technically interesting, but far from meaning anything like alien space poop.
The mass intervals between the peaks suggest organic species with an increasing number of carbon atoms (C7 to C15), which we refer to as high-mass organic cations (HMOCs). While an interval of 14 u [unified atomic mass unit] would indicate the addition of a saturated CH2 group to an organic 'backbone,' the actual mass difference of 12.5 u indicates the presence of predominately unsaturated carbon atoms.
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