Cassini Archives

One set of images taken by Huygens is pictured here showing the view from 2 km altitude. It is in Mercator projection, so the N–S/E–W directions cross at right angles but surface areas appear distorted. Sky above horizon is modfied for formatting.- ESA/Astrobiology.com Original image

Astrogeology, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Saturn, Status Report, Titan, Water/Hycean Worlds & Oceanography

Absence Of A Subsurface Ocean On Titan Indicated By Cassini Data

by Keith CowingJanuary 7, 2026January 7, 2026

The Cassini spacecraft orbited Saturn from 2004 to 2017, performing over a hundred flybys of Titan, Saturn’s largest moon.

Histograms and uncertainty ellipse (red) for computed Re(k2) and Im(k2) compared with the observed uncertainty ellipse (black) for the interior models of Titan without (a) and with (b) an ocean. The centre and axes of the ellipses are computed from the covariance matrix of the posterior distributions obtained from the interior inversion (1σ level of uncertainty). -- Nature via PubMed

Astrogeology, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Missions & Hardware, Status Report, Titan, Water/Hycean Worlds & Oceanography

Titan’s Strong Tidal Dissipation Precludes A Subsurface Ocean

by Keith CowingDecember 24, 2025December 24, 2025

The Cassini mission provided unprecedented insights into Saturn’s largest moon, Titan, from its atmosphere to the deep interior.

This artist’s concept depicts NASA’s Cassini spacecraft performing one of its many close flybys of Titan, Saturn’s largest moon. By analyzing the Doppler shift of radio signals traveling to and from Earth, the mission precisely measured Titan’s gravity field. Credit: NASA/JPL-Caltech

Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Missions & Hardware, Press Release, Saturn, Titan, Water/Hycean Worlds & Oceanography

Titan May Not Have A Global Ocean

by Keith CowingDecember 17, 2025December 17, 2025

A key discovery from NASA’s Cassini mission in 2008 was that Saturn’s largest moon Titan may have a vast water ocean below its hydrocarbon-rich surface. But reanalysis of mission data […]

Plumes on Enceladus (artist concept)– NASA JPL

Astrogeology, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Cryobiology, Enceladus, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Missions & Hardware, Press Release, Saturn, Water/Hycean Worlds & Oceanography

Cassini Study Found Organics From An Ocean Inside Enceladus

by Keith CowingNovember 19, 2025November 19, 2025

NASA’s Cassini spacecraft captured dramatic plumes, both large and small, spray water ice out from many locations along the famed ‘tiger stripes’ near the south pole of Saturn’s moon Enceladus.

The new study constrained the Enceladus’ global conductive heat flow by studying its seasonal temperature variations at its north pole (yellow). These results, when combined with existing ones of its highly active south polar region (red) provide the first observational constraint of Enceladus’ energy loss budget (

Atmospheres, Climate, Weather, Enceladus, Icy Worlds, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Press Release, Water/Hycean Worlds & Oceanography

Enceladus May Host A Stable Ocean Fit For Life, New Study Finds

by Keith CowingNovember 10, 2025November 10, 2025

A new study led by researchers from Oxford University and Southwest Research Institute and the Planetary Science Institute in Tucson, Arizona has provided the first evidence of significant heat flow […]

Enceladus orbiting within Saturn's E ring Credits: NASA/JPL/Space Science Institute larger image

Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Enceladus, Icy Worlds, Saturn, Status Report, Water/Hycean Worlds & Oceanography

Icy Ocean World Enceladus Orbits In The Ring It Makes Around Saturn

by Keith CowingOctober 6, 2025

Saturn’s E ring is a huge, fuzzy, donut-shaped circle of particles around Saturn, that puzzled scientists for a long time.

The inside of Enceladus larger image -- ESA

Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biophysics, Biosignatures & Paleobiology, Enceladus, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Missions & Hardware, Press Release, Saturn, Water/Hycean Worlds & Oceanography

Cassini Proves The Existence Of Complex Chemistry Within Enceladus’ Ocean

by Keith CowingOctober 1, 2025October 1, 2025

Scientists digging through data collected by the Cassini spacecraft have found new complex organic molecules spewing from Saturn’s moon Enceladus. This is a clear sign that complex chemical reactions are […]

An artist’s impression of plumes erupting onto the surface of Enceladus. Its fellow moon Titan is seen in the sky, and the distant Sun beyond. Credit ESA/Science Office. Larger image

Astrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Enceladus, Icy Worlds, Imaging & Spectroscopy, Press Release, Saturn

Study Questions Oceanic Origin Of Organics In Enceladus’s Plumes

by Keith CowingSeptember 9, 2025September 9, 2025

Organic molecules detected in the watery plumes that spew out from cracks in the surface of Enceladus could be formed through exposure to radiation on Saturn’s icy moon, rather than […]