A recent study published in the journal *Icarus* has provided new insights into the potential habitability of Saturn's moon Enceladus. Researchers have estimated the pH levels of its subsurface ocean, revealing a more alkaline environment than previously thought. This finding has significant implications for the search for extraterrestrial life.
The study utilized computer models to analyze data on phosphate levels in ice grains ejected from Enceladus' south polar geysers. These geysers, known as "tiger stripes," were first discovered by NASA's Cassini spacecraft. The models estimate the ocean's pH to be between 10.1 and 11.6, significantly higher than previous estimates.
A more alkaline environment suggests a strong interaction between the ocean and the moon's rocky core. This interaction could provide the necessary chemical energy for life. The presence of organic compounds and phosphorus, a key element for life, further bolsters Enceladus's potential to support life.
The Enceladus Orbilander mission, proposed for the late 2030s, aims to further investigate this potential. This mission would involve orbiting the moon to sample its water plumes and eventually landing on its surface. The goal is to search for signs of life, bringing us closer to answering the question of life beyond Earth.