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Earlier sources: Space
Space research and engineering study the universe and build the systems used to reach and observe it. Follow astronomy, spacecraft, launch systems, satellites, exploration, and Earth observation.
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 ↗534 classified signals in the fourteen-day window. Recent momentum: steady. These counts include signals awaiting readable evidence.
Earlier 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.
- Hacker News · Posted on Hacker News · First archived
A new write and space optimized storage engine for MySQL is here ↗
Hacker News discussion.
- arXiv · Published · First archived
Spins and shapes of asteroids reconstructed from photometry from surveys ↗
Modern asteroid surveys routinely acquire sparse photometric measurements for hundreds of thousands of asteroids. These data can be exploited to reconstruct asteroid spin states and shapes, providing statistical constraints on the rotational evolution of different dynamical populations.Our goal is to derive spin-state and shape models from publicly available survey photometry and use the enlarged sample to investigate the distributions of asteroid physical properties across the Solar System. We combined sparse photometry from Catalina, Mt. Lemmon, Pan-STARRS, ZTF, USNO, ATLAS, ASAS-SN, TESS, a…
- arXiv · Published · First archived
Giant impacts preferentially remove low-mass atmospheres: a generalised scaling law for impact-driven atmospheric loss ↗
Impact-driven atmospheric loss plays a key role in shaping the diversity of planetary atmospheres. However, existing prescriptions for calculating loss from a given impact neglect the critical role of atmospheric mass on loss, and thus often severely miscalculate the extent of loss. Using 3D smoothed particle hydrodynamics simulations, we quantify atmospheric loss during giant impacts onto planets with 1-20% mass fraction atmospheres and show that less massive (lower-pressure) atmospheres are significantly easier to remove. We derive a new scaling law for atmospheric loss that includes the eff…
- Hacker News · Posted on Hacker News · First archived
Girl, 12, fatally shot in US during 'dispute over parking space' ↗
Hacker News discussion.
- arXiv · Published · First archived
SPIRou near-infrared spectropolarimetry of the ultra-hot Jupiter KELT-9b: tentative detection of the planet magnetic field ↗
Exoplanetary magnetic fields govern atmospheric escape and circulation but have eluded detection in close-in planets. In the ultra-hot Jupiter KELT-9b, atmospheric dynamo is predicted to generate atmospheric fields of 400--4000 G. We search for the circular polarization in atomic lines that a magnetic field would imprint, through the Zeeman effect, on the transmission spectrum of KELT-9b. We observed three transits with SPIRou at the CFHT, on 07 September 2025 and 03 and 06 July 2026, and applied least squares deconvolution to 1398 atomic lines to map the transit-averaged Stokes $V$ and null s…
- GitHub · Repository created · First archived
dkorunic/astro-recommender ↗
What to image tonight: ranks deep sky targets and comets for your location, weather, Moon and telescope
- NASA · Source date · First archived
APOD: 2026 October 5 – M104: The Sombrero Galaxy’s Tidal Streams ↗
APOD Science APOD APOD: 2026 October 5 – M104:… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. M104: The Sombrero Galaxy’s Tidal Streams Explanation: A deep image of the Sombrero galaxy reveals surprises. M104 is named the Sombrero galaxy because, on shorter exposures , it looks like a hat . A key defining feature of this huge galaxy is a dark brim of dust…
- NASA · Source date · First archived
Moon-Like Madagascar ↗
Earth Observatory Science Earth Observatory Moon-Like Madagascar Earth Earth Observatory Image of the Day EO Explorer Topics All Topics Atmosphere Land Heat & Radiation Life on Earth Human Dimensions Natural Events Oceans Remote Sensing Technology Snow & Ice Water More Content Collections Global Maps World of Change Articles Earth Matters Blog Blue Marble: Next Generation EO Kids Mission: Biomes About About Us Subscribe 🛜 RSS Contact Us Search From an astronaut’s perspective looking back at Earth, a patch of bright rock in arid southern Madagascar may appear out of place. But it wouldn’t on t…
- Hacker News · Posted on Hacker News · First archived
NOAA Public Space Weather Notice Code: WARK04 Serial Number: 5424 ↗
Hacker News discussion.
- OpenAlex · Published · First archived
Real-time sonar simulation for UUVs using rasterization and omnidirectional screen space reflections ↗
Since real-world testing can be costly, risky, and difficult to reproduce, sonar simulation has become an important tool for developing and validating perception and navigation algorithms for unmanned underwater vehicles (UUVs). This work introduces a real-time sonar simulation framework integrated into the NauSim platform. Based on GPU rasterization and an omnidirectional extension of screen space reflections (SSR), the framework efficiently simulates primary echoes and approximates multipath effects. The proposed framework incorporates several acoustic and imaging phenomena, including Lamber…
Live window recorded . This is the ingestion observation time, not the publication or discovery date of each source.
How to assess evidence about Space
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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