{"id":25725,"date":"2026-01-17T18:30:00","date_gmt":"2026-01-17T23:30:00","guid":{"rendered":"https:\/\/www.ecoticias.com\/en\/?p=25725"},"modified":"2026-01-16T07:48:12","modified_gmt":"2026-01-16T12:48:12","slug":"for-years-there-was-talk-of-a-global-sea-beneath-the-ice-but-the-new-model-paints-a-stranger-picture-a-spongy-moon-with-layers-of-slush-and-pockets-of-water-hidden-deep-below","status":"publish","type":"post","link":"https:\/\/www.ecoticias.com\/en\/for-years-there-was-talk-of-a-global-sea-beneath-the-ice-but-the-new-model-paints-a-stranger-picture-a-spongy-moon-with-layers-of-slush-and-pockets-of-water-hidden-deep-below\/25725\/","title":{"rendered":"For years, there was talk of a global sea beneath the ice, but the new model paints a stranger picture: a spongy moon with layers of slush and pockets of water hidden deep below"},"content":{"rendered":"\n

For years, scientists pictured Titan, Saturn\u2019s biggest moon<\/a>, as a world with a huge hidden ocean tucked under its frozen crust. A new study<\/a> now suggests something stranger and maybe even more promising for life, with Titan acting more like a frozen sponge filled with thick slush and tunnels of meltwater near its rocky heart.<\/p>\n\n\n\n

The research team, led by Flavio Petricca at NASA\u2019s Jet Propulsion Laboratory, went back to precision gravity data from the long\u2011running Cassini mission<\/a>. Using new analysis techniques together with lab work on high\u2011pressure ice, they found that Titan\u2019s interior behaves less like an open ocean and more like Arctic sea ice or underground aquifers, shot through with watery channels.<\/p>\n\n\n\n

A new look inside Saturn\u2019s largest moon<\/h2>\n\n\n\n

Cassini orbited Saturn<\/a> for more than a decade, tracking tiny changes in Titan\u2019s gravity as the moon moved closer to and farther from the planet. As Saturn pulls on Titan, the moon slowly stretches and squashes, a process scientists call tidal flexing, similar to squeezing a stress ball in your hand.<\/p>\n\n\n\n

Back in 2008, those shape changes were strong enough that researchers proposed a global subsurface ocean to explain how easily Titan\u2019s icy shell seemed to bend. The new work adds an extra piece of information by focusing on timing and shows that Titan\u2019s shape lags about 15 hours behind the peak of Saturn\u2019s pull<\/a>, a delay that hints at something much thicker and stickier than simple liquid water.<\/p>\n\n\n\n

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Read More: The 5,200 holes dug into a mountain in Peru are no longer a mystery, and the explanation changes what we knew about their ancient economy<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n

From global ocean to slushy tunnels<\/h2>\n\n\n\n

The Nature study finds that Titan loses far more tidal energy as internal heat than a world with a smooth underground sea should. In simple terms, Titan behaves less like a calm swimming pool and more like a heavy mix of ice grains and water that resists motion, then slowly relaxes.<\/p>\n\n\n\n

Petricca\u2019s team tested many possible interior structures and found that only a thick layer of high\u2011pressure ice, laced with meltwater pockets, can match Cassini\u2019s gravity data and the observed delay in Titan\u2019s flexing. He described the strong energy loss inside Titan as a kind of \u201csmoking gun\u201d that the interior is very different from earlier models that relied on a simple ocean.<\/p>\n\n\n\n

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