Scientists Find More Evidence Saturn’s Moon Enceladus Could Support Life
Scientists have carried out a laboratory experiment that could strengthen the case for searching for life on Enceladus, one of Saturn’s icy moons.
Researchers in Germany recreated conditions believed to exist in the ocean hidden beneath Enceladus’ frozen surface. They then introduced a microorganism from Earth to see whether it could survive in the simulated environment.
Microorganism Survives Harsh Conditions
The research team prepared a mixture containing water, salts, carbonates and powdered rock to reproduce the highly alkaline conditions believed to exist in Enceladus’ underground ocean.
They introduced Methanothermococcus okinawensis, a microorganism found naturally around deep-sea hydrothermal vents on Earth.
The microorganism was able to grow despite the harsh conditions used in the experiment.
The findings are significant because scientists consider several conditions when assessing whether a distant world could potentially support life.
Why Enceladus Is Important
Previous observations by NASA’s Cassini spacecraft provided evidence of a large saltwater ocean beneath Enceladus’ icy surface. Scientists have also detected organic compounds and hydrogen, while evidence points toward possible hydrothermal activity on the ocean floor.
Another important feature is that material from the underground ocean reaches space naturally.
Large plumes of water vapour and ice particles erupt through cracks near the moon’s south pole. Cassini passed through these plumes and analysed their contents during its mission.
Researchers believe these plumes could provide a way for future spacecraft to study material originating from the hidden ocean without having to drill through the moon’s thick ice.
Does This Prove Alien Life?
The experiment does not prove that life exists on Enceladus.
The microorganism used in the study originated on Earth, and scientists have not found evidence that life independently developed on the Saturnian moon.
Instead, the experiment suggests that some microorganisms could potentially survive under conditions similar to those believed to exist inside Enceladus.
Future missions could therefore examine the moon’s plumes and ocean-related material for biological signatures that might provide stronger evidence about whether life exists beyond Earth.
