Articles tagged with Habitable Zones
A new study led by the University of Michigan rules out planets with the mass of Jupiter or larger in the 70 Oph AB binary system, but finds that smaller worlds may still exist within the habitable zone. The research achieved record-setting sensitivity for the system and opens the door for future studies of smaller planets.
Researchers developed a model explaining how lava-covered worlds can maintain thick atmospheres due to molten rock sloshing over surfaces. This new theory expands the cosmic shoreline framework, suggesting a 'cosmic sandbar' region where outgassing balances escape, enabling planets to retain atmospheres.
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.
Astronomers at Caltech IPAC have settled on a leading hypothesis for the unusual hot spot on CoRoT-2 b, a hot Jupiter that defies previous assumptions about its behavior. The planet's slow rotation speed, which is equivalent to about three Earth days per orbit, suggests it is not tidally locked to its host star.
Researchers use NASA's James Webb Space Telescope to analyze light passing through a distant, temperate gas giant planet's atmosphere, revealing methane and potentially other gases. The study provides insights into planetary formation and evolution, and could improve understanding of Earth's atmosphere.
Scientists found that habitable planets must have sufficient water to support a geologic carbon cycle, which stabilizes surface temperatures. Arid planets in the habitable zone are unlikely to be good candidates for life due to carbon cycle disruption, which can lead to runaway warming.
A study found that only planets with medium-level oxygen conditions during core formation can retain essential elements phosphorus and nitrogen, necessary for life. This limits the number of potentially habitable planets, as most solar systems have stars with different chemical compositions.
Astronomers may need to look beyond the traditional habitable zone for liquid water and potentially life-friendly conditions. A new study suggests that tidally locked worlds, even those orbiting closer to cool M- and K-dwarf stars than previously thought, could sustain liquid water on their night side.
Deep magma oceans beneath rocky exoplanets called super-earths could generate powerful magnetic fields to protect against harmful radiation. This suggests that these planets might be more hospitable for life beyond our solar system.
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.
Scientists at UNIGE have developed a high-precision spectrograph called RISTRETTO to analyze light from the exoplanet Proxima b. The instrument can detect signs of oxygen or water in its atmosphere, similar to Earth.
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.
Astronomers have discovered a stellar companion near a star with hot dust, offering a complex laboratory to understand the origin and composition of this phenomenon. This breakthrough builds on decades of technological leadership in interferometry, enabling scientists to study the interaction between the companion and the dust.
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.
A team led by UMD astronomers has created the first three-dimensional temperature map of a planet orbiting another star, revealing distinct temperature zones and water vapor breakdown. The new technique lays the groundwork for future explorations of faraway planets.
Researchers have created the first 3D map of a planet orbiting another star, highlighting distinct temperature zones on WASP-18b. The technique allows for atmospheric variations to be mapped, providing insights into exoplanet temperatures and composition.
Researchers at UC Irvine have identified an exoplanet in the Milky Way Galaxy's habitable zone, which may support liquid water conditions. The super-Earth orbits an M-dwarf star just 18 light-years away, making it a prime target for future direct imaging studies.
Planets with 10% carbon dioxide could maintain a biosphere for 4.2 billion years, while those with 1% carbon dioxide last only 3.1 billion years. These conditions make the existence of technological alien life unlikely, with estimated lifetimes ranging from 280,000 to millions of years.
Scientists found that ionic liquids, formed from sulfuric acid and organic compounds, could persist on planets too warm for water to exist. This discovery increases the habitability zone for rocky worlds, suggesting life might be possible without water.
A team of researchers has discovered a fifth planet in the L 98-59 planetary system, confirming its habitable zone and potential for liquid water. The planets' sizes and masses have been determined with unprecedented precision using data from space telescopes and high-precision instruments.
A new study by Brown University researchers used machine learning to analyze a massive dataset of slope streak features on Mars, finding no evidence of liquid water. The research suggests that the streaks are likely formed by dry processes such as wind and dust activity, rather than liquid flow.
Researchers Mohammad Afzal Shadab and Eric Hiatt developed a computer model that calculates the time it took for water on early Mars to percolate from the surface down to the aquifer, finding a 50-200 year timeframe. This process could have covered Mars with at least 300 feet of water.
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 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.
A study by Philip Kurian and colleagues reveals a revised upper bound on carbon-based life's computational capacity, connecting it to the universe's information-processing limit. The discovery of quantum superradiance in cytoskeletal filaments enables eukaryotic organisms to process information through tryptophan networks.
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.
A team of astronomers has discovered four mini-Earth exoplanets around Barnard's Star, the nearest single star to Earth. The exoplanets are rocky and orbit their home star in a matter of days, with one being the least massive planet discovered using radial velocity technique.
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.
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.
The completion of NASA's Pandora spacecraft bus brings the exoplanet mission one step closer to launch, set to study at least 20 planets' atmospheres for hazes, clouds, and water. The mission will utilize a novel telescope design to capture stellar surfaces and cleanly separate star and planetary signals.
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.
SwRI researchers developed a tool to model environments expected on icy moons, accounting for organics and predicting conditions for microbial life. The project aims to constrain environmental factors and provide valuable information about ocean worlds.
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.
A modelling study suggests that Martian ice deposits in mid-latitudes could provide conditions necessary for photosynthetic life. The study found that ice containing dust content levels between 0.01-0.1% could have a habitable region at depths of 5-38 cm, with cleaner ice allowing for deeper zones.
Researchers from University of Texas at Arlington have identified 206 systems of interest for potential habitability, including one system where the planet is always situated in the HZ. The team analyzed data from NASA Exoplanet Archive and found F-type stars to be a promising case for life beyond Earth.
Researchers at Georgia State University have developed a new approach to finding life beyond Earth by focusing on the most abundant type of star in the universe: M dwarfs. With their vast resources and potential for habitable planets, M dwarfs offer the best chance for scientists to discover life-supporting exoplanets.
Seven rock samples collected along the fan front of Mars' Jezero Crater show evidence of minerals formed in water, suggesting a watery environment. While organic matter cannot be confirmed, these rocks may hold the key to finding remnants of ancient Martian life.
Researchers explored ancient interactions between life and the environment during the Phanerozoic Eon, a period of significant habitability improvements. They found that ocean algae played a crucial role in reducing atmospheric carbon dioxide levels and increasing oxygen levels, allowing for the evolution of more complex life forms.
A recent study by the University of Kansas found that while most US markets have enough housing units available, nearly all lack affordability for very low-income households. The study suggests that addressing housing prices and low incomes are more urgently needed than simply building more homes.
Climate change projections suggest that land-locked lakes on the Tibetan Plateau will increase in volume fourfold by 2100, leading to significant land loss and related impacts. This could alter the landscape, affect wildlife migration routes, and exacerbate climate change through increased greenhouse gas emissions.
Researchers used the TESS-Keck Survey to detect and characterize 126 exoplanets, including 15 new ones. The study utilized both the transit method and radial velocity technique to determine the planets' masses. This collaboration provides new insights into the makeup of exoplanet systems and their host stars.
A new study led by Dr. Assaf Hochman uncovers ozone's impact on atmospheric stability and temperature distribution on Proxima Centauri b, a habitable exoplanet tantalizingly close to Earth's solar system. The research highlights the importance of considering interactive ozone in understanding Earth-like exoplanets.
A team of astronomers and citizen scientists has discovered a planet in the habitable zone of an unusual star system, including two stars and potentially another exoplanet. The newly discovered planet, TOI 4633 c, boasts the second-longest orbit of any planet discovered with TESS data.
A new paper argues that Venus, with its surface temperatures hot enough to melt lead and a toxic atmosphere, can provide valuable lessons about the potential for life on other planets. The study highlights the importance of understanding the conditions that make Earth habitable, as well as the risks of runaway greenhouse effects.
The Juno spacecraft has directly measured charged oxygen and hydrogen molecules from Europa's atmosphere, providing key constraints on the potential oxygenation of its subsurface ocean. The findings suggest that oxygen is continuously produced in the surface ice shell, with an estimated 12 kg per second, which could support habitability.
Researchers have discovered water vapor in the disc around a young star exactly where planets are forming. The Atacama Large Millimeter/submillimeter Array (ALMA) enabled detailed images and spatially resolved observations, revealing three times as much water as Earth's oceans in the inner disc of the HL Tauri star.
Astronomers have discovered an extreme Earth-like planet with lava oceans that orbits its sun-like star every four days. The young planet, just 500 million years old, is the nearest Earth-sized planet found so far and could provide valuable insights into the evolution of planets similar to our own.
Researchers have devised a new method to identify habitable planets and potentially inhabited planets by comparing atmospheric CO2 levels, which suggests the presence of liquid water. This signature can be detected with current telescopes, providing a path to identify life on exoplanets.
Scientists propose searching for depleted carbon dioxide in planetary atmospheres as a sign of liquid water and potentially life on other planets. A study suggests that low carbon abundance relative to neighboring planets could indicate habitability.
A recent study by Professor Amri Wandel reveals that subglacial liquid water can extend the Habitable Zone for tidally locked planets and even broaden its limits. This discovery presents opportunities for searching for extraterrestrial life on a diverse range of exoplanets.
New studies show that giant gas planets in nearby star systems can prevent life on smaller, rocky planet neighbors by kicking them out of orbit and wreaking havoc on their climates. Researchers found that four giant planets in the HD 141399 system are likely to destroy the chances for life on Earth-like planets.
A new study suggests that Venus once had plate tectonics similar to those on early Earth, which could have supported microbial life. The researchers used atmospheric data and computer modeling to show that the planet's current atmosphere and surface pressure would only be possible with an early form of plate tectonics.
A new study finds that four out of five Miami-Dade County residents may face disruption or displacement due to sea-level rise, with lower-income people bearing the brunt. As habitable areas shrink and housing prices rise, only a small number of affluent residents can relocate, while many others are trapped in low-lying properties.
A new study reveals that magma oceans on rocky exoplanets can affect their size, evolutionary path, and mantle structure. The research found that these ocean's compressible nature can make lava-rich planets denser than solid planets of similar size.
Researchers from Ohio State University found that some low-mass stars have unexpectedly strong surface magnetic fields, which could intensify their radiation for billions of years. This discovery challenges current models of stellar evolution and has important implications for the search for life on other planets.
A new study reveals evidence of diverse organic material on Mars, with signals consistent with molecules linked to aqueous processes. The findings suggest the existence of several distinct reservoirs of potential organic compounds, which may have persisted on Mars for a far more extended period than previously thought.
The study found that adding CO2 to temperate terrestrial exoplanet atmospheres intensifies warming in non-irradiated regions, altering global circulation patterns. This effect is seen on both Earth and the exoplanet TRAPPIST-1e, with implications for habitability and climate research.
A newly discovered exoplanet, LP 890-9c, is providing important insights into conditions at the inner edge of a star's habitable zone. The team's models detail differences in chemical signatures generated by rocky planets near this boundary, based on variables including size, mass, and surface temperature.
The James Webb Space Telescope has discovered a massive plume of water vapor on Saturn's moon Enceladus, stretching over 6,000 miles. This finding has significant implications for the search for life beyond Earth, as it suggests that Enceladus may have the necessary ingredients for habitability.