Saturn’s Ocean Moon Keeps ‘Leaking’ Into Space: Scientists Just Discovered It Is Losing Far Less Than Expected

Way out in space, the icy moon Enceladus has long captivated scientists’ attention due to its hidden ocean, and the most spectacular sign of this ocean has been the giant plumes of ice and vapor that erupt from cracks near its south pole. These plumes spew out ice and vapor into space, reaching as high as hundreds of miles, and they are one of the most significant indicators of what lies beneath the icy surface of Enceladus.

These plumes have been of immense interest to scientists over the past few years, as they provide scientists with the rarest of chances to collect samples of material from an alien ocean without having to drill through kilometers of ice.

According to recent discoveries reported by ScienceDaily, scientists have now used supercomputer simulations to narrow down the actual amount of material that Enceladus spews out into space, and the results show that Enceladus loses much less mass than scientists thought.

New Models Change the Plume Story

For some time, estimates were that Enceladus was losing a large amount of material in its geysers, which led to questions about how long the ocean beneath the ice could remain stable. But new research using modeling suggests that the moon is actually losing 20 to 40 percent less material than was previously estimated, which means that the ocean could be more stable than was thought.

This new estimate has been made possible by advanced computer modeling that simulates the escape of ice particles and water vapor from the moon’s surface through cracks in the crust. This allows for a better understanding of the connection between the ocean below and the surface vents that spew the plume material out into space.

In a paper published in Nature Astronomy, the reason why these new estimates of mass loss are important is that they allow scientists to better understand the energy balance that is powering the plumes.

Laboratory Experiments Recreate Alien Plumes

Although computer models are able to simulate the behavior of the plumes, lab experiments are also important for understanding the chemistry that occurs within them. One of the important tools that have been employed in this research is the PISCES experimental chamber, which simulates the pressure and temperature conditions thought to be found in the Enceladus plume environment.

According to a study described in the journal Advances in Space Research, these experiments enable researchers to monitor the behavior of salts, water molecules, and organic materials as they transition from the subsurface ocean to space. The findings enable scientists to understand which chemicals make it from the ocean to the surface.

Much of what scientists know about Enceladus was gathered through the Cassini-Huygens mission, which spent over a decade exploring the Saturnian system and even passed through the moon’s icy plumes.

Heat From a Porous Core

One of the most intriguing questions about Enceladus is how it manages to keep a liquid ocean when the temperatures are so cold in the outer reaches of the solar system. Researchers now think the answer is deep within the moon.

Studies have shown that Enceladus has a rocky interior that is highly porous, and the gravitational pull of Saturn causes this interior to flex as it orbits the ringed planet. This constant tidal heating creates enough friction to warm the ocean beneath the ice crust.

As reported by Sci.News, research in planetary science suggests that this tidal heating process could support a liquid ocean within the moon for millions or even billions of years, potentially creating conditions for microbial life.

Another significant clue comes from the measurement of the rotational wobble of Enceladus, known as physical libration. Researchers analyzing this phenomenon found that the moon wobbles more than a solid body would.

A Prime Target

The combined results of the computer simulations, laboratory experiments, and spacecraft observations have provided us with an in-depth description of Enceladus as an oceanic world that has all the necessary requirements to support life.

The revised estimates of the mass loss from the plumes indicate that Enceladus' ocean is more stable than initially thought, while the analysis of the composition indicates that it has salts, organic compounds, and life-supporting elements. In addition, the experiments have confirmed that amino acids can be formed in environments similar to those in Enceladus' ocean.