Articles tagged with Astrobiology
Astronomers have discovered a planet called Gliese 12 b, which is an 'evil twin' of Earth with conditions similar to Venus. The planet orbits its star in just 12.8 days and receives 1.6 times more radiation than Earth.
A new study challenges the initial detection of a biosignature gas on K2-18b, suggesting that the data may be inconclusive. However, researchers believe it's possible for life to produce detectable levels of dimethyl sulfide (DMS) in the planet's atmosphere.
Researchers find that instruments on future missions can detect cellular material in one out of hundreds of thousands of ice grains, including a common bacterium as a model organism. This breakthrough increases confidence in detecting lifeforms similar to those on Earth.
A team of researchers analyzed sunlight reflected by Titan's atmosphere, identifying over 100 signatures of the methane molecule. The findings also suggest possible evidence of the tricarbon molecule, a discovery that could shed light on the origin of life on Earth.
Researchers at Cornell University have devised a novel way to determine ocean temperatures of distant worlds based on the thickness of their ice shells. This technique can be used to enhance NASA's mission findings about Europa and Enceladus, two Jovian and Saturnian moons that could potentially support life.
A NASA study suggests that 17 exoplanets could have subsurface oceans beneath their icy surfaces, potentially harboring life. The team estimated geyser activity on these planets, predicting that some may exhibit cryovolcanic eruptions, which could be detected using powerful telescopes.
Researchers find complex microbial communities forming giant mounds of rock in a harsh desert environment, resembling ancient stromatolites. The discovery provides an unprecedented look at the earliest stages of life on Earth and may hold clues about life on Mars.
A recent study by researchers from the University of California San Diego has provided evidence that amino acids, the building blocks of life, can survive impact speeds of up to 4.2 km/s in Saturn's icy moon Enceladus' ice plumes. This finding has significant implications for the search for life beyond Earth.
A new study reveals a nonenzymatic chemical network that could have produced pentoses on early Earth, providing clues about primitive biochemistry. The proposed pathway relies on chemical transformations reminiscent of the pentose phosphate pathway, bringing us closer to understanding the emergence of life.
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 team of scientists and philosophers identifies a new law of nature that governs the evolution of complex systems, including plants, animals, stars, and minerals. The law states that complex systems evolve to states of greater patterning, diversity, and complexity, regardless of whether they are living or nonliving.
Scientists have identified a previously unknown class of bacterial proteins that suppress the growth of methane clathrates as effectively as commercial chemicals, but are non-toxic and scalable. This discovery has significant implications for reducing greenhouse gas emissions and increasing the safety of transporting natural gas.
Scientists have discovered a simple test for signs of past or present life on other planets, using artificial intelligence to distinguish between biological and abiotic samples with high accuracy. The method has the potential to revolutionize the search for extraterrestrial life and deepen our understanding of Earth's earliest life.
A team at UW–Madison has compiled 270 combinations of molecules with the potential for sustained autocatalysis, focusing on comproportionation reactions. This cookbook-like approach may help identify conditions for life elsewhere in the universe, guiding future research.
A University of Trento study has demonstrated that inorganic structures can incorporate organic molecules to form primitive cell-like membranes, a key step in the origin of life on Earth. The findings open up new research opportunities for recreating life on other planets and improving drug effectiveness.
Researchers at Breakthrough Listen project have devised a new technique for finding and vetting possible radio signals from other civilizations. The technique eliminates the possibility of signal being mere radio interference from Earth, boosting confidence in future detection of alien life.
The InVADER Mission successfully deployed a high-tech laser laboratory on the ocean floor, marking a paradigm shift in ocean research and exploration. The Laser Divebot collects compositional data without disturbing the environment, removing the need for physical samples.
Researchers at the University of Birmingham are studying how humans can live and operate on Mars, simulating conditions using a unique facility 1.1 km below the surface. The project aims to investigate biomedical procedures for treating tissue damage in space crews.
Scientists measured and compared amino acid abundances with rocky components of Ryugu particles, demonstrating water's role in their formation. The results suggest more ice was present in the precursor of one particle than the other, which may have contributed to the high abundance of a specific amino acid.
Researchers used AI to map sparse life hidden in salt domes, rocks, and crystals at Salar de Pajonales, a Martian analog. The study found that microbial life is concentrated in patchy biological hotspots linked to water availability, and AI can detect biosignatures up to 87.5% of the time.
Researchers from ETH Zurich, Harvard, and Cambridge join forces to study chemical and physical processes of living organisms and environmental conditions for life on other planets. Synthetic cells enable scientists to deconstruct complex systems, understand basic principles of life and evolution.
The Martian meteorite Tissint has revealed a rich inventory of organic compounds, offering insights into Mars' habitability. The study, published in Science Advances, discovered an unprecedented diversity of organic molecules, including magnesium compounds not previously seen on the planet.
A new study suggests that an orbiting space probe could provide definitive answers about the presence of life on Enceladus' ocean. The team mapped out how a hypothetical mission could gather data from the moon's plumes, which are thought to contain organic molecules and methane.
A new study suggests that comet impacts can transport oxidants from Europa's surface to its ocean, increasing the probability of finding life. The research model shows that if an impact reaches halfway through the moon's icy shell, meltwater sinks to the ocean, bringing critical chemicals.
Astronomers found that a planet like GJ 1252b, orbiting an M dwarf star, would likely lose its atmosphere due to intense heat and radiation. The discovery narrows the search for habitable planets around these stars, but leaves room for possibilities further away from the star.
Researchers propose nitrous oxide as a potential biosignature for exoplanets, detectable by the James Webb Space Telescope. They modeled N2O production on Earth-like planets and found it could be comparable to CO2 or methane in star systems like TRAPPIST-1.
The Europlanet Science Congress 2022 will feature press briefings on the ESA Hera Mission, which investigates Binary Asteroid (65803) Didymos and the DART Crater. The event will also cover solar system observations with the Webb space telescope.
Astronomers use telescopes to analyze light from distant worlds, but 'photobombing' can occur when nearby planets contaminate the view. Researchers propose methods to mitigate this effect, such as data processing and multiple telescope observations, to improve habitable planet detection.
The 2022 Europlanet Science Congress will bring together planetary scientists to discuss life beyond Earth. Over 60 scientific sessions cover topics such as current and upcoming missions, astrobiology, and space weather.
Researchers from the University of Arizona suggest that dying stars can forge carbon nanotubes in the envelopes of dust and gas surrounding them. This process involves the spontaneous formation of carbon nanotubes, which are highly structured rod-like molecules consisting of multiple layers of carbon sheets.
The samples returned from the Hayabusa2 mission provide valuable insights into the formation and evolution of our solar system. The study found that Ryugu contains hydrated minerals and evidence of freeze-thawing, indicating that it experienced both liquid and frozen water in its past.
A research team discovered that bacterial cellulose produced by Komagataeibacter bacteria survived on Mars-like conditions. The study found minor changes in the genome after reactivation on Earth, suggesting cellulose as a potential biomarker for extraterrestrial life.
A study published in Cell Reports Physical Sciences has measured the physical limits for liquid water in icy extraterrestrial worlds. The results show that cold, salty liquids can remain liquid at much cooler temperatures than previously thought, extending the range of possible habitats on icy moons.
Methane may be the first detectable indication of life beyond Earth, according to a new study that establishes conditions for biological activity. The researchers found that atmospheric methane is more likely to be considered a strong indication of life if it co-exists with carbon dioxide and lacks carbon monoxide.
A new color catalog of icy planet surface signatures has been created to aid in the search for life on frozen worlds. The catalog, based on microorganisms found in subarctic conditions, provides a tool for comparing Earth's biological microbes with those on other planets.
Researchers propose that cognitive activity operating on a planetary scale is necessary to tackle global issues. A mature technosphere involves integrating technological systems with Earth through feedback loops, making it self-maintaining and exhibiting emergent behavior.
A team of scientists simulated over 200,000 hypothetical Earth-like worlds to understand the types of environments astronomers can expect to find on real exoplanets. They found that in 90% of cases with liquid water on the surface, there are no ice sheets, but rather permanent ice belts along the equator.
The University of Sydney's project searches for Earth-like planets around Alpha Centauri to determine if life could survive there. The team is using advanced telescope technology to analyze the stars' atmospheres and detect signs of life.
Researchers found fatty acid compounds, GDGTs, and archaeol compounds in salt sediments of Qaidam Basin, a promising analog site for Mars exploration. The distribution of lipids provides important references for understanding Martian habitability.
A recent study suggests that strike-slip faulting is an active deformation mechanism on Titan's surface, driven by diurnal tidal stresses and pore fluid pressures. The researchers found that shallow faults near the equator are optimally oriented for potential failure, which could facilitate material transport and affect habitability.
Scientists study potential for life around M-dwarf planets with new telescope, finding atmospheres may be dried out due to intense radiation. The James Webb Space Telescope can detect gases in heavy carbon dioxide or oxygen-dominated atmospheres.
A geoscientist is using a $640,000 NSF grant to investigate why the Earth retains surface water instead of sequestering it in the mantle. He aims to develop a novel technique that links noble gas concentrations with water in subducted rocks to construct a map of water concentration across pressures and temperatures.
A study proposes three resolutions to explain the red sky paradox, where FGK dwarfs are not apparent in the sky despite being five times more common than Sun-like stars. Red dwarfs have a lower probability of emerging intelligent life, a shorter available time window for complex life evolution, and a lower occurrence of habitable worlds.
The AMADEE-18 Mars analog mission in Oman evaluated operational concepts and optimized strategies for future human missions. A benchmarking tool was developed to improve scientific output, mission safety, and efficiency.
The study focused on the design and results of the second field deployment of BASALT, identifying critical capabilities needed for science-driven EVAs. Researchers presented recommendations for future directions and subsequent research objectives.
The Rensselaer Polytechnic Institute-led project seeks to identify and replicate prebiotic molecules under early Earth conditions. Researchers will explore various environments and their potential to give rise to life's chemistry.
The presence of methane on Mars presents novel challenges to explain its formation and implications for potential life on the planet. Researchers recommend further studies to clarify geochemical processes and sources of methane.
The study found that the student-centered design resulted in high course grades and demonstrable mastery of content. The course uses Smart Sparrow's learning platform to access learner analytics, enabling instructors to make rapid design improvements.
Portland State University biologist Ken Stedman and colleagues advocate for virus research beyond Earth, proposing NASA investigate viruses on Saturn's moons, Mars, and ancient deposits. They suggest Earth viruses could survive in space and potentially be spread extraterrestrially.
Researchers use digital holographic microscopy to detect microorganisms and evidence of life in Enceladus water plumes. A universal biosignature is also proposed to detect biological systems on ocean worlds like Enceladus.
A new approach aims to identify planets orbiting nearby stars that support life by focusing on creating a comprehensive list of molecules in their atmospheres. Researchers have searched for thousands of potentially biogenic gas molecules, sparking new research into identifying larger molecules and their potential as signs of life.
The first European Astrobiology Roadmap has been published, outlining five key research topics and recommending a platform for interdisciplinary collaboration. The roadmap prioritizes the study of life in the Solar System and beyond, including habitability, origins of organic compounds, and biosignatures.
Researchers at Georgia Tech use ribosomal RNA to trace life's evolution, finding molecular structures and events near the biochemical origins of life. By analyzing variations in ribosomal RNA, they uncover secrets of creation and answer foundational questions about life's origins.
Researchers found large patches of trace gases shining brightly near Titan's poles, with unexpected east-to-west variations. These findings are consistent with observations made by NASA's Cassini spacecraft, which found cloud caps and high concentrations of gases over the poles.
A new study suggests that early multicellular organisms grew larger to access nutrient-rich currents in the deep seas. The research, published in Current Biology, reveals that these enigmatic life-forms, known as Ediacara biota, reached heights of up to a meter to compete for resources.
A NASA team outlines priorities for a future Europa lander mission to study its potential habitability. The mission would investigate the composition and chemistry of Europa's ocean and the thickness, uniformity, and dynamics of its icy shell.
Microorganisms have been found living in salt deposits of Río Tinto River in Spain, which share similarities with those on Mars. These discoveries provide crucial insights into the habitability potential of Mars and suggest that similar environments may exist elsewhere.
A team of researchers has analyzed bacterial communities on rocks similar to those found in Mexican marshes, providing insights into the Martian environment. The study reveals two distinct communities, one adapted to lack of nitrogen and another without phosphorus, offering clues about potential nutrient limitations on Mars.
A five-year study funded by NASA Astrobiology Institute aims to detect and study deep subsurface microbial life on Earth and beyond. Researchers will test instrumentation in extreme environments like Death Valley and oceanic crust.
Researchers have discovered that Arctic bacteria can produce biosignatures linked to biological activity, which could be indicative of microorganisms on Europa. The study found needle-shaped sulphur crystals and organic compounds in the environment, sparking hopes of finding life beneath Europa's icy crust.