![\"The](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2025\/08\/the-planet-ceres-may-h.jpg\" "\\"Dwarf")
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Dwarf planet Ceres is shown in these enhanced-color renderings that use images from NASA\u2019s Dawn mission. New thermal and chemicals models that rely on the mission\u2019s data indicate Ceres may have long ago had conditions suitable for life. Credit: NASA \/ JPL-Caltech \/ UCLA MPS \/ DLR \/ IDA<\/p>\n
New NASA research has found that Ceres may have had a lasting source of chemical energy: the right types of molecules needed to fuel some microbial metabolisms. Although there is no evidence that microorganisms ever existed on Ceres, the finding supports theories that this intriguing dwarf planet, which is the largest body in the main asteroid belt between Mars and Jupiter, may have once had conditions suitable to support single-celled lifeforms.<\/p>\n
Science data from NASA’s Dawn mission, which ended in 2018, previously showed that the bright, reflective regions on Ceres’s surface are mostly made of salts left over from liquid that percolated up from underground. Later analysis in 2020 found that the source of this liquid was an enormous reservoir of brine, or salty water<\/a>, below the surface. In other research, the Dawn mission also revealed evidence that Ceres has organic material<\/a> in the form of carbon molecules\u2014essential, though not sufficient on its own, to support microbial cells.<\/p>\n The presence of water and carbon molecules are two critical pieces of the habitability puzzle on Ceres. The new findings offer the third: a long-lasting source of chemical energy in Ceres’s ancient past that could have made it possible for microorganisms to survive. This result does not mean that Ceres had life, but rather, that there likely was “food” available should life have ever arisen on Ceres.<\/p>\n In the study, published<\/a> in Science Advances on Aug. 20, the authors built thermal and chemical models mimicking the temperature and composition of Ceres’s interior over time. They found that 2.5 billion years or so ago, Ceres’s subsurface ocean may have had a steady supply of hot water containing dissolved gases traveling up from metamorphosed rocks in the rocky core. The heat came from the decay of radioactive elements within the dwarf planet<\/a>‘s rocky interior that occurred when Ceres was young\u2014an internal process thought to be common in our solar system.<\/p>\n Ceres\u2019s temperature evolution drives major interior events.Depending on the extent of internal heating, a mid-sized (~500- to 1000-km radius) icy body such as Ceres may undergo differentiation and then metamorphism of its interior and ocean freezing, leading to the present-day interior structure. After accreting (1), the temperature within Ceres as a function of time and depth controls the events that determine Ceres\u2019s habitability: (2) ice-rock differentiation at ~4 Myr, (3) metamorphic volatiles are added into the ocean ~0.5 to 2 Gyr, and (4) ocean freezing. Here, we assume the ice shell is made of pure water ice. Credit: Science Advances (2025). DOI: 10.1126\/sciadv.adt3283<\/p>\n “On Earth, when hot water from deep underground mixes with the ocean, the result is often a buffet for microbes\u2014a feast of chemical energy. So it could have big implications if we could determine whether Ceres’s ocean had an influx of hydrothermal fluid in the past,” said Sam Courville, lead author of the study. Now based at Arizona State University in Tempe, he led the research while working as an intern at NASA’s Jet Propulsion Laboratory in Southern California, which also managed the Dawn mission.<\/p>\n The Ceres we know today is unlikely to be habitable. It is cooler, with more ice and less water than in the past. There is currently insufficient heat from radioactive decay<\/a> within Ceres to keep the water from freezing, and what liquid remains has become a concentrated brine.<\/p>\n The period when Ceres would most likely have been habitable was between a half-billion and 2 billion years after it formed (or about 2.5 billion to 4 billion years ago), when its rocky core reached its peak temperature. That’s when warm fluids would have been introduced into Ceres’s underground water.<\/p>\n This illustration depicts the interior of dwarf planet Ceres, including the transfer of water and gases from the rocky core to a reservoir of salty water. Carbon dioxide and methane are among the molecules carrying chemical energy beneath Ceres\u2019s surface. Credit: NASA\/JPL-Caltech<\/p>\n The dwarf planet also doesn’t have the benefit of present-day internal heating generated by the push and pull of orbiting a large planet, like Saturn’s moon Enceladus and Jupiter’s moon Europa do. So Ceres’s greatest potential for habitability-fueling energy was in the past.<\/p>\n This result has implications for water-rich objects throughout the outer solar system, too. Many of the other icy moons<\/a> and dwarf planets that are of similar size to Ceres (about 585 miles, or 940 kilometers in diameter) and don’t have significant internal heating from the gravitational pull of planets could have also had a period of habitability in their past.<\/p>\n![\"NASA:](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2025\/08\/nasa-ceres-may-have-ha.jpg\" "\\"Ceres\u2019s")
<\/p>\n![\"The](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2025\/08\/the-planet-ceres-may-h-1.jpg\" "\\"This")
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