Cassini Archives

Elemental maps of laboratory-frozen droplets containing major salt components expected in Enceladus' ocean. Each column shows the distribution of a different element, while the rows represent different cooling rates. At slower cooling rates, salts become increasingly separated into distinct regions within the droplets, particularly chloride salts associated with sodium and potassium. With faster cooling, the elements remain more uniformly distributed. These experiments show how slow freezing could produce the chemical segregation needed to explain the diverse ice grains detected by Cassini. Scale bars represent 50 micrometres. -- Science

How Enceladus’ Ocean Spray Becomes Chemically Diverse Ice Grains

by Keith CowingSeptember 30, 2026September 30, 2026

[Institute of Science Tokyo] Saturn’s icy moon Enceladus hides a global ocean beneath its frozen surface. From fractures near its south pole, material from this ocean is ejected into space […]

Enceladus

Enceladus Offers Clues In The Search For Extraterrestrial Life

by Keith CowingSeptember 29, 2026September 29, 2026

[Free University Berlin] With a global ocean of liquid water below a thick crust of ice, Saturn’s moon Enceladus is one of the most promising places to search for life […]

Schematic diagram (not to scale) of the experimental apparatus used for benzene ice nucleation and growth studies (adapted from D. Dubois et al. 2021). Pressure was measured with a capacitance manometer (P1) and an ion gauge (P2). The inset shows a top view of the cooled sample holder with the positions of the three K-type thermocouple gauges (red dots) used for temperature measurements. The ice sample formed on either or both sides of the silicon substrate/tholin sample (gray), which was in the path of the IR beam of the Thermo Fisher iS50. IR transmission spectra were collected with a liquid N2-cooled MCT/A detector. -- The Planetary Science Journal

Titan

Experimental Measurements of Benzene Ice Critical Saturation Ratios on Titan Tholins and Impact on the Microphysical Modeling of Titan’s South Polar Benzene Cloud

by Keith CowingSeptember 1, 2026September 1, 2026

[The Planetary Science Journal] The Cassini Composite Infrared Spectrometer revealed the presence of a benzene (C6H6) ice cloud in Titan’s autumn south polar stratosphere following the northern spring equinox in […]

Schematic diagram (not to scale) of the experimental apparatus used for benzene ice nucleation and growth studies (adapted from Dubois et al. (2021)). Pressure was measured with a capacitance manometer (P1) and an ion gauge (P2). The inset shows a top view of the cooled sample holder with the positions of the three K-type thermocouple gauges (red dots) used for temperature measurements. The ice sample formed on either or both sides of the silicon substrate/tholin sample (grey), which was in the path of the IR beam of the Thermo Fisher iS50. Infrared transmission spectra were collected with a liquid N2-cooled MCT/A detector. -- [astro-ph.EP]

Titan

Experimental Measurements of Benzene Ice Critical Saturation Ratios on Titan Tholins and Impact on the Microphysical Modeling of Titan’s South Polar Benzene Cloud

by Keith CowingJuly 25, 2026July 25, 2026

[astro-ph.EP] The Cassini Composite Infrared Spectrometer (CIRS) revealed the presence of a benzene (C6H6) ice cloud in Titan’s autumn south polar stratosphere, following the northern spring equinox in August 2009.

Exoplanets, -moons, -comets

Piercing Through The Haze: Characterizing Titan-like Terrestrial Exoplanets With JWST

by Keith CowingJuly 17, 2026July 17, 2026

[astro-ph.EP] As we enter a new era of using JWST to characterize exoplanet atmospheres, a top priority is defining observational needs and parameters in the search for life on an […]

An artist’s rendition of Saturn’s moon Enceladus depicts hydrothermal activity on the seafloor and cracks in the moon’s icy crust that allow material from the watery interior to be ejected into space. New research shows that instruments destined for the next missions could find traces of a single cell in a single ice grain contained in a plume. NASA/JPL-Caltech

Astrochemistry, Astrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Enceladus, Habitable Zones, Icy Worlds, Status Report

Tidal Rock Grinding As A Source Of H2 On Enceladus

by Keith CowingJune 16, 2026June 16, 2026

The Solar System hosts multiple potentially habitable environments, including the subsurface ocean beneath the icy crust of Saturn’s moon Enceladus.

Example of altimeter echo received from plains. This waveform was recorded during flyby T30 from an altitude of 1964.9 km at an incidence angle 0.0137°. Panel (a) shows a context map. Section of the T30 altimeter track observing the plains from point A to C. The waveform resulting from the integration of three echoes (Burst ID 131027162/4) located at point B is shown in panel (b) the altimetric model is used to fit the echo, resulting in an estimated RMS height of 4 m over the 115 square km footprints. The fitting error is indicated as a percentage by the mean integral relative error (MIRE). Panel (c) shows the large-scale topography of the plains using three elevation trackers, Maximum Likelihood, Threshold, and First Moment. All three trackers agree that the overall surface height changes less than 50 m over 50 km. -- JGR Planets

Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Habitable Zones, Icy Worlds, Mapping, Geodesy, Cartography, Bathymetry, Status Report, Titan

Titan’s Plains Revealed: Evidence For A Layered Surface

by Keith CowingApril 10, 2026April 10, 2026

Undifferentiated plains are the most common terrain type on Titan, yet their composition and geologic history remain poorly understood.

Namib Sand Sea, Ground Penetrating Radar, Yardang, Lut desert,

Analog Studies, Arctic / Antarctic / Alpine, Away Teams & Field Reports, Caves, Craters, Mountains, Subsurface, Lava Tubes, Desert Worlds, Exploration Gear & Tech, Icy Worlds, Lava / magma ocean / Volcanic Worlds, Mapping, Geodesy, Cartography, Bathymetry, Planetary Protection & Biosafety, Polar / Alpine Expeditions, Robotics/Rovers/UAVs, Sample Return, Status Report, Titan, Tricorders & Sensors, Water/Hycean Worlds & Oceanography

Terrestrial Analogs To Titan For Geophysical Research

by Keith CowingFebruary 20, 2026February 20, 2026

Saturn’s moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day.

This view was taken from above the ringplane and looks toward the unlit side of the rings. Here, the probe gazes upon Titan in the distance beyond Saturn and its dark and graceful rings -- NASA/JPL/SSI

Astrogeology, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Hyperion, Impact events, Press Release, Saturn, Titan

Saturn’s Moon Titan Could Have Formed in a Merger of Two Old Moons

by Keith CowingFebruary 11, 2026

Recent research suggests that Saturn’s bright rings and its largest moon, Titan, may have both originated in collisions among its moons.

Illustration of the electrodynamic interaction between Enceladus and Saturn. The primary Alfvén wing is shown in blue, and the reflected Alfvén wings in magenta. The arrow indicates the corotation direction of the Enceladus plasma torus. Relative sizes of Saturn and Enceladus are not to scale. Design & Animation: Fabrice Etifier - École Polytechnique.

Astrochemistry, Astrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Enceladus, Icy Worlds, Imaging & Spectroscopy, Press Release, Saturn

Enceladus Trails A Wake Of Electromagnetic Ripples That Extend Over Half A Million Kilometers

by Keith CowingFebruary 9, 2026February 9, 2026

A major study by an international team of researchers using data from the NASA/ESA/ASI Cassini spacecraft has revealed a lattice-like structure of crisscrossing reflected waves that flow downstream behind the […]