Space & Astronomy

Organic molecules confirmed on Saturn's moon Enceladus

By T.K. Randall
October 4, 2025 ·  7 comments

Image: Enceladus
Credit: (PD) NASA/JPL The sixth largest moon of Saturn, Enceladus is an icy world with similarities to Jupiter's moon Europa.

Like its Jovian counterpart, this frigid world is believed to be home to an ocean of liquid water where primitive extraterrestrial life may thrive unseen even today in its freezing depths.

Back in 2005, NASA's Cassini spacecraft discovered that Enceladus was spewing some of the water from its ocean way up into space by way of powerful geysers from deep fissures on its surface.

By flying through some of the water from these plumes, the spacecraft was able to 'taste' this water directly and found promising organic molecules, including the potential precursors to amino acids.

Now, two decades on, a renewed analysis of the data it collected has revealed that Enceladus is home to a wider range of organic molecules than previously believed, while confirming that these have indeed come from the moon's interior and not from outer space."There are many possible pathways from the organic molecules we found in the Cassini data to potentially relevant compounds, which enhances the likelihood that the moon is habitable," said Nozair Khawaja of the Freie Universitat Berlin and the University of Stuttgart in Germany.

The findings add further credence to the notion that our own solar system may in fact be the best place to look for evidence of alien life.

"I think looking in our own back yard is a win-win," said ESA's Dr Jorn Helbert.

"Now if we discover that there are indeed signs of life [on Enceladus] that makes the search outside our solar system even more exciting."

"If we go and discover that despite all the conditions for habitability, we do not find any signs of life it means that we might need to rethink the definition of habitability or at least reconsider the likelihood of life emerging on a potentially habitable world."

Source: The Guardian | Comments (7)

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