Articles tagged with Habitable Planets
A study published in Nature Communications reveals that ancient ocean chemistry created a self-sustaining cycle that kept oxygen levels high after they first rose. This cycle, fueled by phosphorus recycling, allowed for biological productivity and maintained oxygen in the atmosphere.
Venus, Earth's twin planet, lacks a rocky satellite due to its slow spin and gravity, which causes a moon to collapse and crash into the planet. The discovery sheds light on the planet's evolution and potential habitability.
The panel discussed how advances in engineering are unlocking new scientific missions and driving breakthroughs. Emerging technologies, such as commercial capabilities and artificial intelligence, are reshaping the mission landscape.
The UK is leading the development of one of the core instruments of the Habitable Worlds Observatory, a mission to search for Earth-like planets and study their atmospheres. The observatory aims to answer whether we are alone in the universe with technological advances and scientific breakthroughs.
Astronomers have detected an atmosphere on a rocky planet, LHS 1140 b, in the habitable zone of its host star, which is consistent with conditions for liquid water and potentially life. The discovery was made using the WINERED spectrograph on the Magellan Clay telescope and reveals helium escaping from the upper atmosphere.
Researchers at Michigan State University found that current AI models can be duped into seeing signatures of life in digital organisms with high accuracy. However, when tested on unseen examples, the results were less impressive. The team showed that it was possible to convince the AI that it was seeing signs of life where they didn’t ...
Researchers found amino acids are consistently more diverse and evenly distributed in biological samples than abiotic ones, while fatty acids show the opposite pattern. This fundamental principle of life may be detectable in data collected by space missions.
Researchers pinpoint 45 rocky worlds with potential to support life, including TRAPPIST-1 d and e, Proxima Centauri b, and Kepler 186f. The study also explores the boundaries of habitability using exoplanets with unusual orbits.
Astronomers have created a naturally occurring space weather station around complex periodic variable M dwarf stars to study the environment of planets. This discovery sheds new light on how stars affect their planets' makeup and might provide clues about the habitability of distant worlds.
Researchers reanalyze Cassini mission data to find that Titan's interior is more icy and slushy than previously thought, with implications for the search for life on Titan. The new findings suggest a slushy layer instead of an ocean, which could facilitate the growth of simple organisms.
A new study on TRAPPIST-1's flares could help scientists unravel how the star shapes its nearby planets, potentially in drastic ways. The researchers used observations from NASA's James Webb Space Telescope and computer simulations to understand the physics behind TRAPPIST-1's temper tantrums.
Recent observations of TRAPPIST-1e, an Earth-sized exoplanet in the habitable zone, reveal hints of methane but raise questions about its atmosphere's existence. Researchers caution that more rigorous studies are needed to determine if the methane is a sign of an atmosphere or stellar contamination.
A collaboration of bacteria, including Sporosarcina pasteurii and Chroococcidiopsis, produces natural cement-like materials that can turn Martian regolith into solid concrete. This discovery has the potential to revolutionize construction on Mars and provide benefits for habitat integrity and life-support systems.
A team of scientists has discovered chemical evidence of ancient life in 3.3 billion-year-old rocks, doubling the window of time for detecting organic molecules that reveal information about original organisms. The study also found molecular signs of photosynthesis dating back over 800 million years earlier than previously documented.
Experimental tests demonstrate that interactions between magma oceans and primitive atmospheres during early years can produce significant amounts of water. This process has major implications for the physical and chemical properties of planets' interiors, with potential effects on core development and atmospheric composition.
Astronomers detected complex organic molecules in ices outside the Milky Way for the first time, finding five different carbon-based compounds, including methanol and acetic acid. This discovery sheds light on how chemical ingredients for life spread throughout the cosmos.
Researchers found that methane, ethane, and hydrogen cyanide can interact in ways previously thought impossible, expanding our understanding of chemistry before life emerged. This discovery has implications for the origin of life on Earth and may shed light on similar conditions in other cold environments in space.
A new study on Mars crater deposits reveals the planet went through repeated ice ages driven by shifts in its axial tilt, resulting in a gradual drying of the planet. The study provides insights that can be applied to Earth's changing environment and helps identify safe regions for future missions.
Dr. Glein will discuss Enceladus' deep ocean beneath its icy surface, which contains organic molecules and nutrients needed for life. The Saturn moon's ocean erupts into space, forming a towering plume with constant activity, making it a promising place for life.
New research suggests that technological alien life may be rare on planets without plate tectonics and too little carbon dioxide. The study found that a planet with 10% carbon dioxide could maintain a biosphere for up to 4.2 billion years, while one with 1% carbon dioxide would last only 3.1 billion years.
Xinting Yu, an assistant professor at UT San Antonio, has been awarded the 2025 Harold C. Urey Prize for her contributions to planetary science. Her research focuses on understanding how planetary surfaces and atmospheres interact and evolve, with applications in exoplanet characterization and habitability studies.
A new study has revealed chemical signatures of ancient Martian microbial life in the Bright Angel formation, a region of Jezero Crater known for its fine-grained mudstones rich in oxidized iron and organic carbon. The findings suggest that early microorganisms may have played a role in shaping these rocks through redox reactions.
Astronomers discovered a greedy white dwarf star consuming its closest celestial companion at an unprecedented rate. The study found that the super-dense white dwarf is burning brightly due to the mass transfer between the two stars, potentially leading to a massive explosion visible from Earth.
A new telescope shape, a one-by-20 meter rectangle, could separate stars from exoplanets and find half of all existing Earth-like planets within 30 light-years in less than three years. This design requires minimal technological development compared to other leading ideas.
A new study from NYU Abu Dhabi found that high-energy particles from space, known as cosmic rays, could create energy needed to support life underground on planets and moons. This process, called radiolysis, can power life even in dark, cold environments with no sunlight.
NASA microbiologist James Holden is searching for signs of microbial life in Earth's deep-sea volcanoes, which he believes could be similar to those on Jupiter's moon Europa. The hydrothermal vents, where these microbes thrive, provide a unique environment that may support alien life.
Research suggests that airport radar systems and military operations can inadvertently reveal our existence to potential advanced alien civilizations due to hidden electromagnetic leakage. Worldwide aviation hubs like Heathrow and Gatwick emit signals strong enough to be detected by telescopes up to 200 light-years away.
A team of researchers at Harvard University has demonstrated the growth of green algae inside shelters made from bioplastics in Mars-like conditions. The experiments show a closed-loop system that can sustain itself and grow over time, offering a potential solution for sustainable habitats in space.
A recent study led by Heidelberg University astronomers has found that Earth-like planets are more common than previously thought around low-mass stars. The research team identified four new exoplanets, with the largest one having a mass 14 times greater than Earth and orbiting its host star in approximately 3.3 years.
The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) has successfully completed its initial commissioning aboard the Europa Clipper spacecraft. The instrument will analyze Europa's atmospheric gases and surface materials, searching for evidence of potential plumes erupting from within the icy moon.
A team of researchers has found a planet orbiting at a 90-degree angle around a pair of young brown dwarfs, marking the first time such strong evidence for a 'polar planet' orbit is collected. The discovery was made possible by pioneering data analysis that improved precision by a factor of 30.
The detection of dimethyl sulfide and dimethyl disulfide in the atmosphere of exoplanet K2-18b provides the strongest evidence yet for biological activity outside our solar system. The signals are consistent with predictions for a 'Hycean' planet, but further observations are needed to confirm the findings.
A team of researchers at the University of Oxford has found evidence in a rare type of meteorite that supports the theory that water on Earth is native, rather than originating from asteroids. The discovery suggests that the early Earth had sufficient hydrogen to form water molecules.
Researchers have modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune, finding evidence for a thick, hot atmosphere. The study suggests that the planet is unlikely to be habitable, but offers insights into alternative paths of planetary origins and evolution.
Researchers suggest looking for tell-tale patterns of energy instead of particular molecules or compounds associated with life. They argue that any living organism is extremely unlikely to be on its own and will always be part of an ecological community.
A recent study by ETH Zurich researchers suggests that if scientists examine 40–80 planets and find no signs of life, they can confidently conclude that fewer than 10–20% of similar planets harbor life. This finding would enable scientists to put a meaningful upper limit on the prevalence of life in the universe.
Researchers estimate that detecting no signs of life on 40-80 exoplanets would allow for an upper limit on the prevalence of life in the universe. However, uncertainties and biases in individual observations must be carefully considered to ensure reliable results.
Researchers found that the intense heat and pressure under new planets cause water and gas to react, creating unexpected mixtures. This reaction leads to a 'rainfall' deep inside the atmosphere, reshaping the planet's evolution for billions of years.
Researchers used TESS data to identify close-in sub-Neptunes and found that their frequency changes over time, suggesting a combination of processes shaping their formation and evolution. The study provides clues about the properties of these planets and addresses long-standing questions about their origins.
Using advanced simulations, researchers Sho Shibata and Andre Izidoro suggest that super-Earths and mini-Neptunes form from distinct rings of planetesimals, providing fresh insight into planetary evolution. Their model replicates key features of exoplanetary systems, including the radius valley and 'peas-in-a-pod' pattern.
Researchers have found that similar patterns of cracks on planets Earth, Mars and Europa may indicate past water presence and potential life. The study uses a mathematical framework to analyze two-dimensional fracture networks across the solar system.
The discovery of a long-lived planet-forming disk around the star WISE J0446B reveals that disks can persist for three times longer than expected. The study provides new insights into planetary formation and the habitability of planets outside our solar system, particularly for low-mass stars.
A study examined floating plants on ocean planets and found they display a pronounced red edge in their reflectance spectra, potentially detectable via satellite remote sensing. The characteristic seasonal variation in NDVI values suggests this method could be promising for detecting life on habitable exoplanets.
Researchers found that white dwarf exoplanets could have more habitable surface area than previously thought due to their fast rotation periods. The study suggests these stars may present new avenues for exoplanet and astrobiology research.
Scientists have retrieved handpicked samples from Mars, including rock cores and fragmented rocks, for the first time in history. The samples will help learn more about Mars' past life, climate, and geology, as well as provide insights into Earth's surface.
A new study reveals that first-generation planetesimals in the inner solar system were rich in moderately volatile elements, which were later lost during violent cosmic collisions. This discovery reshapes our understanding of how planets acquired their ingredients.
Researchers found that radio signals, such as planetary radar emissions, are the most detectable technosignatures, visible from up to 12,000 light-years away. Atmospheric technosignatures like nitrogen dioxide emissions can be detected from 5.7 light-years away with the upcoming Habitable Worlds Observatory.
Astronomers detect a super-Earth in an eccentric orbit, oscillating between habitable and non-habitable zones. The discovery provides a laboratory for testing new hypotheses on the search for life beyond Earth.
Researchers at Penn State's PSETI Center have been awarded a three-year, $480,000 grant to search for technosignatures from planets outside the solar system. The team plans to use novel laser and radio detection techniques to analyze patterns of humanity's deep-space radio transmissions as a baseline for understanding alien civilizations.
Researchers from Texas A&M University have introduced a novel thermodynamic concept called the 'centotectic,' which investigates the stability of liquids in extreme conditions. The study provides critical information for determining the habitability of icy moons like Europa, with potential implications for planetary exploration efforts.
Researchers analyzed TRAPPIST-1 b's mid-infrared data to determine if it has an atmosphere. The study used a global analysis of all available JWST data and compared the observations with surface and atmospheric models.
A new detection method has been used to identify over 100 small asteroids in the main asteroid belt, ranging from bus-sized to stadium-wide. This breakthrough could aid in tracking potential asteroid impactors and provide insights into meteorite origins.
Astronomers have discovered a fourth planet in the unusual Kepler-51 system, which consists of three ultra-low density 'super-puff' planets. The new planet, Kepler-51e, has a mass similar to the other three and follows a circular orbit of approximately 264 days.
A team of astronomers from the University of Cambridge found that Venus' interior is too dry for liquid water to have existed on its surface. This conclusion challenges long-held theories and has implications for understanding Earth's uniqueness and searching for life elsewhere in the Solar System.
Researchers at UTIG develop a computer model to detect oceans in Uranus' moons by analyzing small oscillations in their spin. The technique could reveal liquid water worlds throughout the galaxy, potentially harboring life.
A Curtin University-led study has found geochemical 'fingerprints' of water-rich fluids in a 4.45 billion-year-old zircon grain from the Martian meteorite NWA7034. This discovery opens up new avenues for understanding ancient Martian hydrothermal systems and the planet's past habitability.
Researchers have discovered preserved biosignatures in volcanic caves, including calcium and sodium sulfates, indicating past microbial activity. This finding highlights lava tubes as potential refuges for microbial life, shedding light on the search for extraterrestrial life on Mars.
A new theoretical model estimates the probability of intelligent life emerging in our Universe and potentially in multiverse scenarios. The model suggests that the observed dark energy density in our Universe is not the most likely to support life, but a higher density would still be compatible.
Researchers have derived a new formula to estimate the maximum occurrence rate of Earth-like habitats (EHs) in the galaxy, concluding that these habitats are relatively rare. The investigation suggests that the probability of extraterrestrial intelligence is significantly rarer still.
A University of Washington-led study suggests that rocky planets orbiting M-dwarf stars can maintain stable atmospheres over time, enhancing the chances of supporting life. The James Webb Space Telescope has observed hotter planets without significant atmospheres, but temperate planets in the 'Goldilocks zone' may have stable atmospheres.