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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 ↗519 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
Show HN: Andurel V2 – Space-Grade Go Web Framework ↗
Hacker News discussion.
- GitHub · Repository created · First archived
wieslawsoltes/CadSpace ↗
Modular 2D/3D CAD workspace: double-precision drafting, layers, blocks, splines, mesh modeling and DXF exchange. C# with Uno Platform, SkiaSharp and OpenGL/WebGL; runs on desktop and in the browser. Libraries ship as NuGet packages.
- arXiv · Published · First archived
Modeling of the variability of D-region ionospheric electron density during solar cycle-24 ↗
Solar cycle variation of earth's atmosphere, particularly the ionosphere is of particular interest in the field of space science and space weather studies. In this article, we present the outcome of our detailed quantitative study on solar cycle variation of lower ionospheric properties using numerical investigation. First, we seek to model and compare the collective D-region ionization rates (q's) due to the individual contributions from the ionizing sources, namely, (a) solar extreme ultraviolet (EUV) radiation including the Lyman-alpha irradiation and (b) solar X-ray irradiation throughout…
- NASA · Source date · First archived
APOD: 2026 September 27 – Andromeda Before Photoshop ↗
APOD Science APOD APOD: 2026 September 27 –… 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. Before After Andromeda Before Photoshop Explanation: What does the Andromeda galaxy really look like? The featured before image shows how our Milky Way Galaxy ‘s closest major galactic neighbor really appears in a long exposure through Earth ‘s busy skies and with a…
- arXiv · Published · First archived
The July 2023 Outburst of Comet 12P/Pons-Brooks: Observations and Modeling of Dust Coma and Arc Structure ↗
We conducted continuous imaging observations of comet 12P/Pons-Brooks, which has experienced multiple outbursts since 2023 July. Among these, we determined the dust coma expansion velocities and the occurrence times for three outbursts. The outburst on 2023 July 20.39$\pm$0.05 had an expansion velocity of 207.5$\pm$0.1 [unit]. The outburst on 2023 November 14.52$\pm$0.10 had an expansion velocity of 305.8$\pm$13.7 [unit], and the outburst on April 2.23$\pm$0.06, 2024 had an expansion velocity of 408.9$\pm$14.3 [unit]. During the July outburst, in addition to the isotropically expanding dust co…
- arXiv · Published · First archived
On the Secular Evolution of Inclinations Among the Classical Belt TNOs ↗
Proper orbital elements have been used in diverse ways to study the dynamical architecture of transneptunian objects (TNOs), providing insights into Solar System evolution and migration theories. In this paper, we present the numerically-computed proper elements of all known TNOs. We then compare their distribution with the distribution of proper elements of a large synthetic sample generated to study the secular behavior of TNOs in the Classical belt region in an effort to better understand certain observed features, particularly features appearing in the inclination distribution of these TNO…
- OpenAlex · Published · First archived
Multi‐Dimensional Physical‐Layer Security via Digitally Mediated Space–Time Modulation ↗
ABSTRACT Modern sensing and communication systems increasingly operate in congested electromagnetic environments, where suppressing the observability of radiated signals at unintended receivers is essential for secure operation. Space–time modulation offers a powerful means of shaping radiation for secure transmission by exploiting temporal degrees of freedom, but its achievable control is often limited by hardware‐bound modulation dimensions, with further expansion incurring substantial system complexity. Here, we propose a new digitally mediated space–time modulation paradigm that significan…
- OpenAlex · Published · First archived
Orbital Coupling Over N‐Bridged Zn─Co Atomic Pairs Enables Lignocellulose Valorization ↗
ABSTRACT Production of monophenols and carbohydrates through reductive catalytic fractionation is the key operation for lignocellulose utilization. Metal utilization can be maximized by single‐atom catalysts, but catalytic performance is limited by the insufficient activation capability of a single site. Here, N‐bridged Zn─Co atomic pairs with compressed Zn─N/Co─N bonds are constructed to enable continuous orbital coupling near the Fermi level, by which the C β ─O bond of lignin is activated by accepting charge via vacant Co d xz / d yz orbitals and the C α ─OH bond is activated by injecting c…
- GitHub · Repository created · First archived
monji024/diskr ↗
Tired of full disks? diskr finds what’s eating your space, checks disk health, and cleans safely — never deletes the wrong thing.
- arXiv · Published · First archived
Worlds Next Door. V. A Candidate Solar System Scale Super-Jupiter in the 61 Cygni Binary System ↗
We present new constraints on a candidate third companion in the 61 Cygni binary system-one of the closest neighbors to our solar system (3.5 pc), the first stars to have a measured parallax, and two of the most favorable targets for habitable zone exo-Earth searches with future direct imaging missions. Kervella et al. (2022) first identified the candidate based on a 4.4$σ$ tangential velocity anomaly in the system determined using Hipparcos and Gaia DR3 astrometry of the A and B components. We combine this astrometric evidence with constraints from Gaia DR3 RUWE, MMT/Clio Lp imaging, nearly f…
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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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