Ceres ... yet another ocean world

Yet another ocean world.

In the foreground, is Cerealia Facula ("facula" means bright area), a 9-mile-wide (15-kilometer-wide) region with a composition dominated by salts. The central dome, Cerealia Tholus, is about 1.9 miles (3 kilometers) across at its base and 1,100 feet (340 meters) tall. The dome is inside a central depression about 3,000 feet (900 meters) deep..

Ocean worlds are cropping up all over with Ceres joining Enceladus, Europa and Ganymede as entities containing the elements needed to harbor life as we know it.

Data from NASA's recent Dawn mission answers two long-unresolved questions: Is there liquid inside Ceres, and how long ago was the dwarf planet geologically active?
NASA's Dawn spacecraft gave scientists extraordinary close-up views of the dwarf planet Ceres, which lies in the main asteroid belt between Mars and Jupiter. By the time the mission ended in October 2018, the orbiter had dipped to less than 22 miles (35 kilometers) above the surface, revealing crisp details of the mysterious bright regions Ceres had become known for.

Scientists had figured out that the bright areas were deposits made mostly of sodium carbonate - a compound of sodium, carbon, and oxygen. They likely came from liquid that percolated up to the surface and evaporated, leaving behind a highly reflective salt crust. But what they hadn't yet determined was where that liquid came from.

By analyzing data collected near the end of the mission, Dawn scientists have concluded that the liquid came from a deep reservoir of brine, or salt-enriched water. By studying Ceres' gravity, scientists learned more about the dwarf planet's internal structure and were able to determine that the brine reservoir is about 25 miles (40 kilometers) deep and hundreds of miles wide.

Ceres doesn't benefit from internal heating generated by gravitational interactions with a large planet, as is the case for some of the icy moons of the outer solar system. But the new research, which focuses on Ceres' 57-mile-wide (92-kilometer-wide) Occator Crater - home to the most extensive bright areas - confirms that Ceres is a water-rich world like these other icy bodies.

But she is closer to the sun than the ocean worlds listed in this piece. :)

Addendum ... “The material found on Ceres is extremely important in terms of astrobiology,” she said.“We know that these minerals are all essential for the emergence of life.”

The resolution varies from about 11 feet (3.5 meters) per pixel in the bright regions to about 115 feet (35 meters) per pixel in the background. The color data that is overlain on the topographic data was obtained during the prime mission in 2015 when the spacecraft was at an altitude of 915 miles (1470 kilometers). It has a resolution of 450 feet (140 meters) per pixel.