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Astronomy
This space thread follows astronomy through original research, public projects, and source reports. Read the evidence below to see which developments are represented in SYMTRI’s archive.
SYMTRI organizes observations from public sources into a living map. Connections reflect shared subject matter; they do not establish causation or endorse a source.
Open in the map ↗239 classified signals in the fourteen-day window. These counts include signals awaiting readable evidence.
Recent sources
Up to ten sources with readable evidence, ordered by their feed timestamp. These archive sources can be older than the live fourteen-day window. This list is a sample, not a measure of total activity. Dates distinguish paper publication, repository creation, model/dataset activity, Hacker News posts, and KEV catalog additions. “First archived” records when SYMTRI first stored the signal.
- arXiv · Published · First archived
LSST and Keck characterization of outer Main Belt comet P/2026 N2 ↗
We characterize comet P/2026 N2, whose outer Main Belt orbit has $a=3.07$ au, $e=0.21$, and $i=2.25^\circ$, using optical observations, archival imaging, and dynamical integrations. Observations from the Legacy Survey of Space and Time (LSST) at NSF-DOE Vera C. Rubin Observatory in 2026 June-July and Keck/LRIS imaging on October 7 show active morphology across perihelion over 102 days. Within a projected aperture radius of approximately 1,000 km, Keck colors of $g-r=0.50\pm0.05$ and $r-i=0.06\pm0.06$ mag are consistent with nearly neutral B/C-complex reflectance. Phase-corrected $a(0^\circ)fρ=…
- arXiv · Published · First archived
Singles in Disguise: Kepler's Low-SNR Single-Transiting Systems as Incompletely Detected Multis ↗
NASA's Kepler mission found more systems with one transiting planet (``singles'') than expected from those with several (``multis''). This excess was first taken as evidence for a Kepler dichotomy -- a second population of intrinsically single or highly inclined systems -- but later work argued that selection effects acting on a single population can reproduce it. Singles also show a puzzling excess of low signal-to-noise ratio (SNR) detections relative to multis. The question arises whether this excess reflects false positives, a selection effect, or an inherent population difference. Here we…
- arXiv · Published · First archived
Identifying deformed exoplanets with JWST and Ariel: A target selection metric for phase curve observations ↗
The shape of an exoplanet encodes fundamental information about its internal structure. For close-in giant planets, strong stellar tidal forces induce measurable deformations that can be probed through high-precision photometry. These deformations are quantified by the fluid Love numbers, which characterise a planet's response to external perturbations and are directly linked to its internal density distribution. In this work, we assess the potential of JWST and the future Ariel mission to constrain the Love numbers of hot Jupiters through full-orbit phase curve observations. To identify the m…
- arXiv · Published · First archived
Chemical Demographics of Star-forming Regions ↗
Our understanding of complex organic chemistry during the formation of stars and planets is shaped by a handful of cherry-picked sources with bright molecular emission lines. This observational bias impedes our assessment of how universal chemical complexity is during star formation. The lack of systematic wideband spectral surveys for statistically significant samples of protostars and cores is a major roadblock to properly probing how COM inventories and abundances depend on the vast range of physical conditions, local cloud and global galactic environments, and evolutionary timescales of lo…
- arXiv · Published · First archived
A New Method for Constraining 3D Exoplanet Atmospheres: Application to WASP-94A b's Panchromatic Spectrum ↗
A growing number of transiting exoplanets exhibit spectroscopic evidence that their leading and trailing limbs differ. Interpreting these observations is now the limiting step. The standard approach of fitting limb-resolved transit depths results in highly anti-correlated transit depths, and treating them as independent measurements can result in strongly biased ($3σ$) retrieved molecular abundances. We present an inference framework that avoids these correlations by using the temporal signature of limb asymmetry instead. This wavelength-dependent shift in mid-transit time, or `time-shift spec…
- arXiv · Published · First archived
Millimetre/Sub-Millimetre SETI: Expanding the Radio Technosignature Parameter Space with ALMA2040 ↗
The search for extraterrestrial intelligence (SETI) has been largely concentrated at centimetre wavelengths, and in particular in the 'water hole' (1.42-1.66 GHz) range. The millimetre and sub-millimetre sky is, by contrast, almost entirely unsearched. It also offers some natural advantages: above 35 GHz, the interstellar and interplanetary media are effectively transparent and non-dispersive, terrestrial interference is sparse, and interferometry suppresses what interference remains. Both antenna gain and usable fractional bandwidth increase with frequency, so a civilisation optimising direct…
- arXiv · Published · First archived
A Sample of Thick-Disk Stars Hosting Hot Jupiters ↗
We present a homogeneous analysis of 268 confirmed and candidate transiting hot-Jupiter host stars with 4800K 8 Gyr, may allow for a better understanding of how the formation of hot Jupiters depends on galactic environment, and how their orbits evolve over very long time scales.
- arXiv · Published · First archived
Bridging the gap between stars and planets ↗
The formation mechanisms of brown dwarfs (BDs) and free-floating planets (FFPs) are poorly constrained. The two main competing scenarios include the star-like scenario, where these objects correspond to the least massive gravitationally unstable fragments of molecular clouds, and the planet-like scenario, where these objects form in a circumstellar disk and are subsequently ejected after a dynamical interaction. A new generation millimeter interferometer, such as ALMA2040, is required to disentangle the relevance of these scenarios. For this, ALMA2040 must provide the appropriate performance t…
- arXiv · Published · First archived
High-frequency water megamasers as precision probes of black holes, galaxies and cosmology: A case for a next-generation sub-mm/mm interferometer ↗
Water megamasers in the circumnuclear disks of active galactic nuclei are among the most precise probes of supermassive black holes. VLBI imaging of 22 GHz disk masers has provided geometric distances to independently constrain $H_0$, accurate black hole mass measurements, and sub-parsec views of accretion disk geometry. ALMA has opened a new window into water maser transitions in the sub-mm/mm regime, which trace temperatures, densities and disk regions that are inaccessible at 22 GHz, and can be observed at higher spatial resolution and with less free-free absorption. However, current detect…
- arXiv · Published · First archived
ALMA2040: Submillimeter-wave Limb Sounding of Venus and Mars ↗
Venus and Mars are unique laboratories for understanding the evolution and diversity of terrestrial planets. Despite their broadly similar rocky compositions, their atmospheres, climates, and surface environments have evolved into dramatically different states. Understanding the physical and chemical processes responsible for these divergent pathways is essential for interpreting terrestrial exoplanets and their habitability. By the 2040s, spacecraft missions will provide unprecedented close-up observations of Venus and Mars, while ground-based facilities can provide the long-term monitoring n…
Live window recorded . This is the ingestion observation time, not the publication or discovery date of each source.
How to assess evidence about Astronomy
Check each original source for its methods, release status, limitations, and supporting data. A repository announcement, a preprint, and a published study provide different kinds of evidence. SYMTRI’s subject classification helps discovery; it does not independently validate the source’s claims.
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