-
crossref
2025-08-26T13:19:38Z
置信度 0.70
-
crossref
Shvetha Suvarna Chynoweth
2026-02-03T00:18:01Z
置信度 0.70
-
crossref
2018-08-28T07:09:34Z
置信度 0.70
-
crossref
Néstor Espinoza Pérez
2023-03-06T07:58:51Z
置信度 0.70
-
Abstract Space-based missions such as Kepler , and soon the Transiting Exoplanet Survey Satellite ( TESS ), provide large data sets that must be analyzed efficiently and systematically. Recent work by Shallue & Vanderburg successfully used state-of-the-art…
crossref
Megan Ansdell, Yani Ioannou, Hugh P. Osborn, Michele Sasdelli 等
2018-12-05T12:15:36Z
置信度 0.70
-
crossref
2018-09-05T11:05:40Z
置信度 0.70
-
crossref
David Cont
2023-03-24T18:00:25Z
置信度 0.70
-
High-precision astrometry is a powerful tool for detecting and characterizing Earth-like exoplanets within the habitable zones of nearby solar-type stars. This contribution focuses on the scientific objectives and instrumental implementation of high-precision …
crossref
Fabien Malbet
2026-07-02T16:32:44Z
置信度 0.70
-
crossref
JOHN ASHER JOHNSON
2018-03-04T15:16:02Z
置信度 0.70
-
In this study, we go beyond the usage of a single modeling approach and employ a range of scalable ML models, including Random Forest (RF), Decision Tree (DT), K-Nearest Neighbors (KNN), and Gradient Boosting (GB). However, to comprehensively evaluate the perf…
crossref
Fatemeh Fazel
2024-07-03T12:38:20Z
置信度 0.70
-
crossref
2019-02-23T16:27:53Z
置信度 0.70
-
We report the discovery and validation of four extrasolar planets hosted by the nearby, bright, Sun-like (G3V) star HD~108236 using data from the Transiting Exoplanet Survey Satellite (TESS). We present transit photometry, reconnaissance and precise Doppler sp…
crossref
Tansu Daylan
2020-09-16T13:45:36Z
置信度 0.70
-
crossref
2026-07-17T09:15:07Z
置信度 0.70
-
Since the discovery of the first transiting Exoplanet in 1999, shortly after the initial discovery by the radial velocity method,  over 3189 such systems have been discovered.  As a result in recent years the field has started to transition f…
crossref
Mark Salisbury
2020-10-08T10:21:39Z
置信度 0.70
-
We try to reconcile contrasting results about the composition of exoplanet atmospheres investigated with high-resolution and low-resolution spectroscopy.
crossref
Giuseppe Morello
2021-07-22T11:30:19Z
置信度 0.70
-
crossref
2012-02-08T06:25:52Z
置信度 0.70
-
The subjects of our research are temperate exoplanets, which is a class of exoplanets with an equilibrium temperature between 300K and 500K, and our goal is to expand the atmospheric characterization and the investigation of haze and cloud formation focusing o…
openalex
Sofia Paraskevaidou
2025-07-09
置信度 0.72
ExoplanetAstrobiologyTemperate climateEnvironmental sciencePhysics
-
crossref
2018-03-04T15:16:02Z
置信度 0.70
-
crossref
Sarthak Singh
2025-07-04T00:22:09Z
置信度 0.70
-
The prime focus of astrobiology research is the search for life elsewhere in the universe, and this proceeds with the pragmatic methodology of looking for water and Earth-like conditions. In our solar system, Venus is the most Earth-like planet, yet at some po…
crossref
Stephen Kane
2025-03-14T17:52:37Z
置信度 0.70
-
Abstract We present the results from a spectroscopic survey using the MOSFIRE near-infrared spectrograph on the 10 m Keck telescope to search for Ly α emission from candidate galaxies at z ∼ 9–10 in four of the CANDELS fields (GOODS-N, EGS, UDS, and COSMOS). W…
crossref
Rebecca L. Larson, Steven L. Finkelstein, Taylor A. Hutchison, Casey Papovich 等
2022-05-09T07:50:35Z
置信度 0.70
-
crossref
2018-03-04T15:16:02Z
置信度 0.70
-
crossref
2025-08-26T18:15:19Z
置信度 0.70
-
crossref
Andrew Gould
2016-09-05T05:01:32Z
置信度 0.70
-
crossref
Jeffrey Linsky
2025-01-29T10:09:58Z
置信度 0.70
-
crossref
2023-07-27T09:02:26Z
置信度 0.70
-
This article is an anecdotal recap of lessons learned from the ALH 84001 debate in light of the historical and recent debate over the Viking results. While it has been 50 years since Viking, it has also been 30 years since the announcement of possible indigeno…
europepmc
Andrew Steele
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
The NASA Viking mission successfully landed three separate biological experiments on Mars in 1976 with a goal to detect microbial processes or materials in samples of the planet’s regolith. While the Labeled Release (LR) experiment yielded robust signals, inte…
europepmc
Jon J. Calomiris
2026
置信度 0.80
-
After Viking proved that long-term, meaningful scientific data could be sent reliably from the martian surface, the field fundamentally shifted. Its success reshaped how scientists and engineers formulated their research and planned future missions. In a simil…
europepmc
Shannah Withrow-Maser, Tove Ågren, Jonathan Bapst
2026
置信度 0.80
-
Following the Viking experiments in 1976, many of the original inferences of biological metabolism have been replicated via abiotic mechanisms we now know are plausible on Mars’ surface. While in many cases subsequent experiments have cast doubt on whether Vik…
europepmc
Devan M. Nisson, Rebecca L. Mickol, Adam Robinson, Karen G. Lloyd
2026
置信度 0.80
-
Biological evolution confronts situations in which the modification of a trait to improve the performance of one function may diminish the performance of another. Similar trade-offs occur in economics and engineering, where they are evaluated with the concept …
europepmc
Niall Rodgers, Corentin C. Loron, H. James Cleaves, Mark A. van Zuilen 等
2026
置信度 0.80
-
Fleeting public interest in the Viking mission inspired Carl Sagan to devise a new mode of science communication. One result was the Cosmos television series. Carl’s global success offended many in the scientific community, and he was punished despite his soli…
europepmc
Ann Druyan
2026
置信度 0.80
-
europepmc
Charles H. Lineweaver
2026
置信度 0.80
-
Accessing the martian deep subsurface is a long-standing scientific priority for astrobiology, climate reconstruction, and planetary evolution, yet robotic drilling missions have historically been limited by wellbore instability, loss of working-fluid circulat…
europepmc
Luis Phillipe Tosi, Marcel Veismann, Scott M. Perl, Kristopher Sherrill 等
2026
置信度 0.80
-
The ambiguity of the Viking lander life-detection experiments left microbiology and microbial ecology out of space missions for 50 years. However, this was largely because the scientific process inherent in the search for life was misunderstood by a space expl…
europepmc
Charles S. Cockell
2026
置信度 0.80
-
The Viking missions hosted identical payloads on each of two orbiters and landers. All four missions far exceeded their pre-planned operating times and science objectives, with all but one of the 40 science experiments operating fully successfully. Six experim…
europepmc
Benton C. Clark
2026
置信度 0.80
-
Questions about our earliest beginnings have filled thinking minds for millennia across cultures, faiths, and wide-ranging frontiers of research. Asking where we come from is as fundamental as astrobiology’s driving query of “are we alone?” These days, we ofte…
europepmc
Timothy W. Lyons, Ramanarayanan Krishnamurthy, Karyn L. Rogers, Loren Dean Williams
2026
置信度 0.80
-
This article outlines engineering challenges that were involved in the design innovations required to successfully deliver not one but two landers for Viking. The mission faced unique challenges such as dealing with Mars’ thin atmosphere, managing entry heatin…
europepmc
Ethiraj Venkatapathy, David B. Hash
2026
置信度 0.80
-
The Viking Mars mission raised intriguing questions about Mars’ surface chemistry. More than three decades later, an array of small electrochemical sensors included on the Phoenix Mars lander provided a key insight: Perchlorate, chlorine’s most highly oxidized…
europepmc
Samuel P. Kounaves, Antonio J. Ricco
2026
置信度 0.80
-
The most important quest in Mars exploration is the search for biosignatures. We adopt a Mars System Science approach, calling on information from the atmosphere, hydrosphere, cryosphere, lithosphere, and geologic history for an integrated organizational frame…
europepmc
James W. Head, Robin D. Wordsworth, James L. Fastook
2026
置信度 0.80
-
The potential of planetary atmospheres as habitats is understudied and likely underestimated. Although planetary atmospheres can provide the fundamental physical, chemical, and energetic requirements for life, they also represent unique challenges to survival …
europepmc
Noam R. Izenberg, Diana M. Gentry, Rakesh Mogul, Kevin McGouldrick 等
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
This review of martian organic geochemistry aims to contextualize recent findings of organic molecules in martian meteorites and from Mars missions within the broader study of origins of life on Earth. Analyzing martian organic inventories helps us understand …
europepmc
Andrew Steele, Chenying Wang, Anushree Srivastava, Karyn Rogers 等
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
The Perseverance rover recently discovered sedimentary rocks reddened by ferric oxides and peppered with bleached spots lacking these oxides. Some of these spots are associated with phosphate, iron sulfide minerals, and organic matter and are regarded as “pote…
europepmc
Sev Zielinska, Naomi Felton, Philip B. Vixseboxse, Sean McMahon
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
The topography and chemical composition of Earth’s early crust likely shaped the conditions under which self-replicating biomolecules emerged. The stability of these molecules depended on dynamic interactions across Earth’s interior and surface, from the core …
europepmc
Wriju Chowdhury, Dustin Trail, Mike Ackerson
2026
置信度 0.80
-
The tree of life is rooted at the “origin of life.” One model holds that core biochemistry, which includes the genetic code, the ribosome, biopolymer backbones, and amino acid and nucleotide monomer alphabets, was inherited vertically from a single origin of l…
europepmc
Jessica C. Bowman, Nigel Goldenfeld, Karyn L. Rogers, Anton S. Petrov 等
2026
置信度 0.80
-
We describe the physical processes that affect the formation, trapping, and outgassing of O 2 at Europa and Ganymede. Following Voyager measurements of their ambient magnetospheric plasmas, laboratory data indicated that the observed ions, which were mostly ej…
europepmc
Apurva V. Oza, Robert E. Johnson, Carl A. Schmidt, Wendy M. Calvin 等
2026
置信度 0.80
-
Extreme environments on Earth are often studied as analog environments on other planetary bodies, since other planetary bodies in our solar system have extreme conditions for life as we know it. Extremophiles are commonly studied in astrobiology given that the…
europepmc
Gaurav Yadav, Bronwyn L. Teece, Roohi Roohi
2026
置信度 0.80
-
To address the chemistry responsible for life’s emergence, we examine the simple chemicals accessible on early Earth and the processes that could have transformed them. We focus on carbon reduction as a process central to the direct precursors of life. Two mai…
europepmc
Eloi Camprubi, Ben K.D. Pearce, Martina Preiner
2026
置信度 0.80
-
The anhydrobiotic (living without water) yeast Saccharomyces cerevisiae has gained considerable interest for its use in a variety of fields, from investigation of the biological effects of deep space radiation exposure to its utilization as a radiation dosimet…
europepmc
Michel Lapointe, Sebastian Tattenberg, Camille Bélanger-Champagne, Stan Yen 等
2026
置信度 0.80
-
Both the geologic and genomic records provide information on the earliest history of terrestrial life. Despite the challenges inherent to the fragmentary and highly metamorphosed earliest rock record, microfossils as old as ∼3.5 billion years (Ga) and potentia…
europepmc
Elizabeth A. Bell, Gregory P. Fournier
2026
置信度 0.80
-
The ubiquitous iron oxides and oxyhydroxides on Mars represent intriguing targets in the search for evidence of past microbial life on the Red Planet. So far, no studies have systematically investigated microbial fossils in fluviolacustrine ferricrete composed…
europepmc
Tara Djokic, Patrick M. Smith, Jennifer O’Keefe, Vera A. Korasidis 等
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
Manganese oxides, thought to form almost exclusively through reactions between Mn 2+ and O 2 , catalyze oxidative transformations among redox-sensitive metals. Thus, the occurrence of Mn oxides, either observed or inferred from sedimentary geochemical data, ha…
europepmc
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
europepmc
Jacob Haqq-Misra
2026
置信度 0.80
-
europepmc
Bruce Damer, David Deamer
2026
置信度 0.80
-
Prebiotic chemistry for the origin of life requires a high degree of chemical and mineralogical complexity with the potential for multiple reactions under differing physico-chemical conditions. This includes processes that can promote the condensation reaction…
europepmc
Martin J. Van Kranendonk, Laura K. Penrose, Jeff Havig, Michael C. Rowe 等
2026
置信度 0.80
-
This article provides a discussion of the scientific, intellectual, and ideological frameworks that influenced Oparin’s formulation of the heterotrophic theory of the origin of life. Based on a Darwinian perspective, Oparin rejected the generally accepted idea…
europepmc
José Alberto Campillo-Balderas, Ricardo Hernández-Morales, Antonio Lazcano
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
We analyzed the lipidome of the endolithic community in halite nodules from Salar Grande in the hyperarid Atacama Desert, which is considered an analog for martian subsurface environments. We tested the utility of complex functionalized lipids to trace possibl…
europepmc
Stephanie Kusch, Florence Schubotz, Julio Sepúlveda, Thorsten Bauersachs
2026
置信度 0.80
-
Solid surfaces have long been considered catalysts in prebiotic chemistry, yet their physical energy has rarely been explored as a driver of protocell assembly. This opinion article highlights recent experimental advances demonstrating that oxide minerals, Had…
europepmc
İrep Gözen
2026
置信度 0.80
-
High concentrations have long been thought to be important in prebiotic chemistry as they offer a way to circumvent a lack of available enzymatic catalysis to overcome kinetic barriers. Here, we argue that fluxes and timescales are also of critical importance.…
europepmc
Craig R. Walton, Skyla B. White, Paul B. Rimmer
2026
置信度 0.80
-
Evolution on Earth often follows unpredictable pathways for the emergence of new species that are dependent upon the environment. Therefore, we can assume that the chemical origins of life and Darwinian evolution began with processes that are not apparent toda…
europepmc
Caner Karabasoglu, Aysenur Saytas, Beril Akgol, Simay Mercimek 等
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
Home to a lake around 4 billion years ago, Jezero Crater is a unique location to study the interplay between igneous processes and aqueous alteration on ancient Mars. The Máaz formation, rich in basaltic rock, is the highest stratigraphic unit on the crater fl…
europepmc
Kimberly P. Sinclair, Benton C. Clark, Michael W.M. Jones, David C. Catling 等
2026
置信度 0.80
-
The “NASA definition” enjoys broad popularity among scientists, particularly in the astrobiology community: life is “a self-sustained chemical system capable of Darwinian evolution.” Imprecise and difficult to implement, it nevertheless captures important feat…
europepmc
Lucas J. Mix
2026
置信度 0.80
-
In future years, it seems likely that someone will claim they have discovered a process that allows a mixture of simple molecules to assemble into structures and systems with the fundamental properties of life. A useful exercise for researchers is to imagine w…
europepmc
David Deamer
2026
置信度 0.80
-
Volcanic eruptions and glacial ice have occurred at virtually all latitudes and altitudes throughout Mars history. To assess the astrobiological potential of processes and microenvironments associated with lava flows onto glacial ice, we explore: (1) the influ…
europepmc
James L. Fastook, James W. Head
2026
置信度 0.80
-
In addition to being delivered via exogenous means (e.g., chondritic meteorites and comets), amino acids are hypothesized to have been present on early Earth via Urey–Miller-type abiotic processes. They conceivably coexisted in the primordial soup with nucleot…
europepmc
Udita Bandyopadhyay, Souradeep Das, Sahil Sunil Mulewar, Tejashwini R 等
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
The three signature structures of cells are membranes, proteins, and nucleic acids. These structures differ markedly in their composition, so how did they first come together in one unit? And how were peptides and oligonucleotides with functions benefiting the…
europepmc
Roy A. Black
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
The hot spring hypothesis for the origin of life proposes that naturally occurring wet–dry cycles in small bodies of water could have driven condensation reactions on prebiotic Earth. Mononucleotides exposed to wet–dry cycles in the laboratory have been shown …
europepmc
Povilas Šimonis, Martynas Malikėnas, David Deamer, Viktoras Masevičius
2026
置信度 0.80
-
The original conditions from which primitive life emerged on the early Earth were likely to be dilute mixtures of organic compounds in aqueous solutions. A significant challenge for origins of life research is to discover the reactions that allowed such mixtur…
europepmc
Bruce Damer, David Deamer
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
europepmc
Alta E. G. Howells, Catherine G. Fontana, Sabrina Elkassas, Tristan A. Caro 等
2025
置信度 0.80
-
europepmc
2026
置信度 0.80
-
Under the RNA first hypothesis for the origin of life, RNA that emerges from prebiotic chemistry performed both catalytic and informational roles. Ribose is the only sugar in RNA; thus, many have sought to understand how ribose might have emerged on a prebioti…
europepmc
Yuna Takahashi, Hyo-Joong Kim, Steven A. Benner, Takeshi Kakegawa 等
2026
置信度 0.80
-
Exposure experiments that involve biological samples subjected to solar ultraviolet (UV) radiation (UVA, UVB, and UVC wavelengths) have advanced an understanding of biological responses in the harsh environment of space. These experiments provide insights abou…
europepmc
Binquan Zhang, Guohong Shen, Changsheng Tuo, Huanxin Zhang 等
2026
置信度 0.80
-
Ocean world plumes at Enceladus, Triton, and possibly Europa are astrobiologically significant. These active processes may transport fresh material from potentially habitable subsurface environments to the surface and atmosphere/exosphere, where they can be ac…
europepmc
Morgan L. Cable, Elizabeth J. Kirby, Isabella A. Musto, Christopher R. Glein 等
2026
置信度 0.80
-
Astronomy is probably the oldest science of mankind and thus older than writing. With the development of exact natural sciences, various astronomical sciences such as astrochemistry, astrobiology and some more have developed. The current rapid development of s…
europepmc
Karsten Strey
2026
置信度 0.80
-
The origin of life is yet a compelling scientific mystery that has sometimes been attributed to high-pressure impacts by small solar system bodies such as comets, meteoroids, asteroids, and transitional objects. High-pressure torsion (HPT) is an innovative met…
europepmc
Kaveh Edalati, Jacqueline Hidalgo-Jiménez, Thanh Tam Nguyen
2026
置信度 0.80
-
The measured abundance (30–50 ppb) of long-chain (C 10 –C 12 ) alkanes and their possible carboxylic acid precursors found in the ancient Cumberland mudstone in Gale crater would have been substantially higher before the onset of exposure to ionizing radiation…
europepmc
Alexander A. Pavlov, Caroline Freissinet, Daniel P. Glavin, Christopher H. House 等
2026
置信度 0.80
-
europepmc
2026
置信度 0.80
-
Biological activity has shaped environments across Earth with varying degrees of impact throughout geological time, which complicates efforts to distinguish signs of life in preserved structures. This challenge is further compounded in the ancient rock record,…
europepmc
Schuyler R. Borges, George A. Schaible, Ana J. Sagasti, Bronwyn L. Teece 等
2025
置信度 0.80
-
Gas chromatography-mass spectrometry data from the Viking Mars mission were misinterpreted in 1976 as showing that martian soils contain no organic molecules, and therefore no life, even though the three life detection experiments delivered by Viking all repor…
europepmc
Steven A. Benner, Dirk Schulze-Makuch, Jan Spacek, Clay Abraham
2025-12-30T17:01:33Z
置信度 0.80
-
europepmc
2026
置信度 0.80
-
The recent detection of proteinogenic amino acids and nucleobases in asteroid Bennu samples marks a pivotal discovery in astrobiology, yet the chemical pathways that govern their formation remain enigmatic. Here, we leverage computational chemistry and a syste…
europepmc
Jeehyun Yang, Yuk L. Yung
2025
置信度 0.80
-
Mars missions actively search for organic matter as potential biosignatures. Yet harsh conditions at the surface, including unfiltered ultraviolet (UV) light above 190 nm and oxidizing agents such as perchlorates, challenge the preservation of compounds releva…
europepmc
Naila Chaouche-Mechidal, Fabien Stalport, Thomas Audoux, Rachel Gonthier 等
2025
置信度 0.80
-
On Mars, the amount of ultraviolet C (UVC) radiation that reaches the surface is sufficiently deleterious for life as we know it. However, it has been predicted that some ancient lakes on Mars had high concentrations of Fe 3+ , an ionic species known for a hig…
europepmc
Gabriel Gonçalves Silva, Ana Paula Muche Schiavo, Ismael Elvis da Silva, Isabelle Cristina Galina 等
2025-11-21T16:13:44Z
置信度 0.80
-
europepmc
2025
置信度 0.80
-
europepmc
2026
置信度 0.80
-
Planetary impact events have profoundly influenced the origin of life and the habitability of Earth in both constructive and destructive ways. The constructive effects of impacts include building Earth into a habitable world and providing the key ingredients f…
europepmc
Benjamin A. Black, Katherine R. Bermingham
2025
置信度 0.80
-
europepmc
2026
置信度 0.80
-
europepmc
2026
置信度 0.80