Cassini detects complex organic molecules in Enceladus geysers on Saturn

Cientistas reanalyzed data collected by the Cassini probe and identified complex organic molecules in material expelled directly from Encélado’s subsurface ocean in Saturno. The moon ejects plumes of ice and steam through cracks in the icy crust. The new study confirms that these compounds arose in the ocean and were not just the result of changes in space.

The ice grains analyzed were captured minutes after ejection. Pesquisadores detected categories of molecules with carbon, nitrogen and oxygen that had not appeared in previous analyzes of the E ring of Saturno. Esses findings indicate ongoing chemical reactions deep within the satellite.

Moléculas detected in fresh plumes from Encélado in Saturno

The team led by Nozair Khawaja of Freie Universität Berlin examined information from Cassini’s cosmic dust analysis instrument. The data came from a close flyby in 2008, just 21 kilometers from the surface. Newly identified organic compounds include structures such as esters, alkenes, and ethers.

The researchers compared the fresh material from the plumes with older samples from Saturno’s E ring. The molecules in the fresh grains showed no signs of prolonged exposure to space radiation. Frank Postberg, co-author of the work, highlighted that the complex compounds already existed in the ocean before the ejection.

The study was published in the journal Nature Astronomy in October 2025. Ele reinforces previous observations by Cassini about the presence of liquid water, salts and hydrogen in Encélado in Saturno. Cinco of the six chemical elements essential to life on Terra (C, H, N, O, P) now appear confirmed in the moon’s environment. Apenas sulfur has not yet been detected.

• Grãos ice collected minutes after ejection
• Moléculas with varying carbon chains and functional groups
• Presença confirmed precursors for biologically relevant compounds
• Oceanic Origem proven by comparison with Saturno E-ring material
• Dados flyby from 2008 reprocessed with new methodologies

Underground Oceano of Encélado in Saturno shows chemical activity

Encélado measures about 500 kilometers in diameter and maintains a global ocean beneath a multi-kilometer layer of ice. Fontes seafloor hydrothermal vents likely provide energy and minerals that fuel reactions. The plumes emerge from the south pole through fissures known as “tiger stripes”.

Cassini recorded these jets during the mission between 2004 and 2017. Instrumentos measured the chemical composition, temperature and speed of the particles. The new results show that the ocean functions as a chemical reactor capable of producing larger molecules from simple precursors.

Simulações laboratory tests performed by teams at Japão and Alemanha reproduced similar conditions. Elas generated organic compounds close to those observed in the plumes. The process involves interactions between water, rocks and heat in the hydrothermal environment.

Leia Também

Rockstar Games releases free Grand Theft Auto V license for 48 hours in digital stores

Potapova loses to Kostyuk in Madrid after tension with boyfriend in the stands

Third season of Euphoria returns with chaotic wedding and adult characters

Implicações for habitability of Encélado into Saturno

The detection of fresh complex organic molecules expands the debate about conditions favorable to life. Na Terra, similar compounds participate in chains that lead to amino acids and other biological structures. However, the presence of these elements does not equate to the existence of organisms.

Cientistas emphasize that the next step involves dedicated missions to collect direct samples or analyze the ocean at greater depth. Agência Espacial Europeia and NASA discuss concepts for probes that can traverse the plumes or even land on the surface.

The Cassini-Huygens mission, a partnership between NASA, ESA and the Italian space agency, ended operations in 2017 with a controlled descent into the atmosphere of Saturno. Archived data continues to yield discoveries nearly a decade later.

Previous Análises already pointed to chemistry rich in Encélado in Saturno

In 2018, researchers had already reported large organic molecules in plumes. Current work goes further by confirming internal origin and identifying new classes of compounds. The combination of phosphates, hydrogen and now these complex organics strengthens the habitability profile.

Outros bodies from Sistema Solar, like Europa from Júpiter, also feature subsurface oceans. Encélado in Saturno stands out for the observable activity of the plumes, which allow remote study without drilling into the ice.

Próximos studies should explore detailed composition

International Equipes plans refinements to old data analysis techniques. Modelos computational systems will attempt to more accurately simulate the ocean pressure, temperature and pH conditions of Encélado in Saturno. Laboratórios terrestrials will continue to replicate environments to test formation of even more complex molecules.

The scientific community awaits proposals for future missions that could resolve outstanding doubts about the moon’s biological potential.