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Topics · Science

Astronomy and space

As of snapshot 27745 under ledger-default@0.3.0. Counts by assessment state, descriptive only: no topic is scored. 2 Contradicted1 Insufficient evidence2 Leans supported2 Not assessed46 Supported1 Unresolved

ClaimTypeAssessment
The study identifies three alteration episodes in the Jezero Margin unit: carbonate-rich ridge formation from CO2-rich fluids, later carbonate remobilization with silica precipitation, and late fluorite-bearing calcium-sulfate veins from fluids through younger fractures.HISTORICALSupported
Lower Jezero Margin-unit exposures show a complex history of water-rock interaction, unlike the high-elevation exposures described in the study.OBSERVATIONALSupported
At elevations above approximately −2350 m, the Jezero Margin unit has texture and chemistry indicative of slowly cooled crystalline olivine-rich rock without significant water exposure.OBSERVATIONALSupported
The Dewar-region evidence implies that the Moon had an internally generated magnetic field stronger than 10 μT around 4.2 billion years ago.QUANTITATIVELeans supported
Joint gravity and magnetic observations identify a roughly 60-km-wide, 9-km-deep dense, strongly magnetized body beneath the Moon’s Dewar region, interpreted as a buried volcanic complex.OBSERVATIONALSupported
The study reports that Methanothermococcus okinawensis carbon and energy metabolism in the simulated system was fueled by abiotic H2 from mineral-water reactions.OBSERVATIONALSupported
Transcriptomic analysis associated growth under extreme CO2 scarcity in the simulated Enceladus chemistry with overexpression of the reductive acetyl-CoA CO2-fixation pathway.OBSERVATIONALSupported
In simulated Enceladus-like ocean chemistry, Methanothermococcus okinawensis grew at alkaline conditions up to pH 11, beyond its previously known pH limit.OBSERVATIONALSupported
The University of Arizona report says researchers manually searched publicly available JWST spectra from hundreds of galaxies and identified three with absorption patterns indicating carbon, oxygen and silicon.OBSERVATIONALSupported
The study’s joint H2O and CO2 constraints favored near-equilibrium chemistry, approximately 10× solar metallicity, and a 3-sigma upper limit of C/O below 0.52.QUANTITATIVESupported
The study reported tentative retrieval evidence for H2S in HAT-P-1 b’s atmosphere, with log10 Bayes factor 1.4.QUANTITATIVESupported
The study reported strong retrieval evidence for H2O and CO2 in HAT-P-1 b’s atmosphere, with log10 Bayes factors of 8.9 and 52.3, respectively.QUANTITATIVESupported
The study used 19 astrometric positions of S301 that outlined an ellipse on the sky and yielded a consistent orbit.QUANTITATIVESupported
The fitted S301 orbit has eccentricity about 0.982–0.983 and a pericentre distance of approximately 136–142 Schwarzschild radii.QUANTITATIVESupported
The study’s mixing model estimated that 8–10% Hadean bridgmanite in the source could reproduce the mean µ142Nd value of Fani Maoré lavas.QUANTITATIVESupported
The study reported that the Fani Maoré isotope anomalies require mantle material formed within the first 100 million years of Earth’s history.HISTORICALSupported
HD 3167 b's dayside is cooler than the maximum expected for an airless world, providing evidence for an atmosphere.CAUSALSupported
HD 3167 b is the coolest lava world yet reported with evidence of an atmosphere.COMPARATIVESupported
In the study's lunar-construction logistics model, 223 of 294 structured cases were analytically feasible and 197 met numerical acceptance criteria, yielding an 88.3% conditional acceptance rate.QUANTITATIVESupported
A sequentially valid reanalysis found that evidence against ΛCDM was concentrated almost entirely in the DESI LRG2 redshift bin, weakened to mild support for ΛCDM when that bin was removed, and did not survive a look-elsewhere correction across seven bins.COMPARATIVESupported
Combining DESI DR2 and complementary data in a multi-parameter w0wa cosmology fit produced an approximately 3-sigma preference for an evolving dark-energy equation of state over ΛCDM, while the corresponding Bayes factor was inconclusive.COMPARATIVESupported
The study concluded that Earth formed from inner-Solar-System material whose average composition remained consistent during accretion.OBSERVATIONALUnresolved
Across ten nucleosynthetic isotope anomalies, the study found that an extension of the non-carbonaceous meteorite array intersected the bulk silicate Earth composition within one standard deviation.QUANTITATIVESupported
BepiColombo observations indicate that sustained high-energy particle precipitation can occur during solar energetic-particle events on weakly magnetized rocky planets close to their stars.OBSERVATIONALSupported
During BepiColombo’s 4 September 2024 Mercury flyby at 165 km altitude, the disappearance of energetic protons was associated with magnetic shadowing by the planet.OBSERVATIONALSupported
For the three studied early galaxies, the reported gas metallicities were log(Zgas/Zsun) of −0.52, −0.85 and −0.78, respectively.QUANTITATIVESupported
The study reported galaxy-associated, metal-enriched gas and signatures of baryon cycling in at least a subset of luminous galaxies within the first several hundred million years of cosmic time, before the completion of reionization.OBSERVATIONALSupported
JWST/NIRSpec spectroscopy detected blueshifted absorption from neutral, low-ionization and high-ionization metal species in three galaxies at redshifts 7.2 to 9.3, with velocity offsets of approximately 50 to 250 km/s from their nebular systemic redshifts.QUANTITATIVESupported
UBC reported that CHIME made a standalone detection of neutral-hydrogen emission from roughly five billion years ago using 94 nights of 2019 observations, demonstrating a potential independent intensity-mapping route for studying cosmic expansion.OBSERVATIONALLeans supported
The study estimates that observations over roughly a decade could have a fair chance of directly measuring Sagittarius A*’s spin from the S301 orbit.FORECASTNot assessed
The star S301 near Sagittarius A* has an 8.7-year orbit and reaches a peak orbital speed of about 25,000 kilometres per second.QUANTITATIVESupported
The reported electron-cyclotron-maser radio emission from β Pictoris b implies a planetary magnetic field of at least 1.25 kG, described as the first direct exoplanet field-strength measurement.QUANTITATIVESupported
MeerKAT observations reported the first direct detection of auroral radio emission from the giant exoplanet β Pictoris b, including rapid recurring circularly polarized bursts and persistent emission from 0.85 to 3.5 GHz.OBSERVATIONALSupported
The study found no evidence of a massive outer planetary companion or wide stellar binary companion to GJ 3090, and reported that this disfavors gravitational-perturbation explanations for the planet’s retrograde orbit.OBSERVATIONALSupported
Six NIRPS/HARPS transit observations yielded a 3D orbital obliquity of 136^{+24}_{-18} degrees for the sub-Neptune GJ 3090 b, establishing it as a retrograde planet around an M dwarf in the study.QUANTITATIVESupported
JWST/NIRSpec spectroscopy detected blueshifted absorption from neutral, low-ionization, and high-ionization metals in three galaxies at redshift 7.2–9.3, consistent with galaxy-associated kinematically disturbed gas before the midpoint of cosmic reionization.OBSERVATIONALSupported
Using a stacking analysis of 4.5 years of observations, LHAASO detected very-high-energy gamma-ray emission from five nearby giant molecular clouds, with spectra consistent with cosmic rays interacting with interstellar matter over 1–100 TeV.OBSERVATIONALSupported
In the reported model, a $200,000 per-satellite post-mission-disposal bond reduced annual derelict satellite mass by more than one-third and increased welfare by up to 27%.QUANTITATIVESupported
Between 2010 and 2024, 40% of satellites in non-naturally compliant orbits successfully deorbited, according to the reported study.QUANTITATIVESupported
In the reported Bayesian hybrid-accretion model, bulk silicate Mars reflected 27 ± 5% pebble-accreted material and 73 ± 5% Vesta-like planetesimal material.QUANTITATIVESupported
In the reported Bayesian hybrid-accretion model, bulk silicate Earth was best reproduced by at least 75% contribution from pebble-accreted protoplanets and up to about 25% Vesta-like planetesimal material.QUANTITATIVESupported
The GJ 3090 study found no evidence of a massive outer planetary companion or a wide stellar binary companion in the searched parameter space.OBSERVATIONALSupported
NIRPS and HARPS observations of the sub-Neptune GJ 3090 b yielded a 3D orbital obliquity of 136° with an uncertainty of +24°/−18°, indicating a retrograde orbit.QUANTITATIVESupported
For the Margin Unit, the Perseverance team can determine the sequence of water interactions but not their ages.INTERPRETIVESupported
Perseverance found that early-Mars Margin Unit rocks show evidence of at least three separate water interactions, each further altering their chemistry and appearance.OBSERVATIONALSupported
One of the lightest brown dwarfs found in IC 348 by Webb showed signs of a disk.OBSERVATIONALSupported
NASA’s Webb observations of the star-forming region IC 348 found brown dwarfs with masses as low as twice Jupiter’s mass.QUANTITATIVESupported
NASA reported that Webb observations of the gas giant WD 1856 b detected methane signatures in its atmosphere while it orbited a white dwarf.OBSERVATIONALSupported
A Tohoku University Earth Science page reported that six sugars, including ribose and glucose, were detected in sand returned from asteroid Bennu.TEXTUALSupported
Analyses of samples returned from asteroid Bennu detected 14 of the 20 amino acids used by life on Earth to make proteins and all five canonical nucleobases.QUANTITATIVESupported
John Smart's transcension hypothesis holds that sufficiently advanced civilizations turn inward into simulation rather than expanding into space, which would explain the Fermi paradox.TEXTUALInsufficient evidence
If there is a first open contact with non-human intelligence, it will happen far earlier than 2063.FORECASTNot assessed
The Great Wall of China is the only human-made structure visible from space.OBSERVATIONALContradicted
The Great Wall of China is visible from space with the naked eye.OBSERVATIONALContradicted