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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 ↗528 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 matching Delphi decompilation of Space Rangers game by GPT-6 Astra ↗
Hacker News discussion.
- arXiv · Published · First archived
Irradiated Atmospheres VII. Effect of Mixing Energy Flux on Atmosphere-Interior Coupling ↗
Highly irradiated, underdense rocky planets such as puffy Venuses may host strong coupling between their atmospheres and magma-ocean interiors. Previous studies have mainly treated this coupling through radiative transfer and chemical equilibrium, leaving the role of vertical mixing unclear. Here we quantify how energy transport associated with vertical mixing modifies the thermal structure, volatile chemistry, and emission spectra of puffy Venuses. Atmospheric circulation and gravity-wave breaking are possible dynamical sources of such transport. We show that this energy transport provides an…
- Hacker News · Posted on Hacker News · First archived
Sugar from Outer Space Became One of the Backbones of Life on Earth ↗
Hacker News discussion.
- arXiv · Published · First archived
Candidate O I 7774 Å Absorption from an Escaping Rock-Vapor Outflow of BD+05 4868 Ab ↗
Disintegrating rocky planets provide a rare opportunity to probe material escaping directly from intensely irradiated planetary surfaces. We present time-resolved, low-resolution ($R\simeq600$) optical spectroscopy and complementary ground-based photometry of BD+05 4868 Ab. The in-transit spectra exhibit an additional unresolved absorption feature near the O I triplet at 7771.94, 7774.17, and 7775.39 Angstroms relative to the out-of-transit baseline. The feature has an equivalent width of $W_λ\simeq1.4\pm0.2$ Angstroms, a maximum differential depth of approximately 9%, and an apparent width of…
- NASA · Source date · First archived
APOD: 2026 October 4 – Supernumerary Rainbows over New Jersey ↗
APOD Science APOD APOD: 2026 October 4 –… 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. Supernumerary Rainbows over New Jersey Explanation: Yes, but can your rainbow do this? After the remnants of Hurricane Florence passed over the Jersey Shore, New Jersey , USA in 2018, the Sun came out in one direction but something quite unusual appeared in the opposit…
- arXiv · Published · First archived
Spectral Energy Distribution and Polarimetric Properties of Dust in the Interstellar Comet 3I/ATLAS ↗
The interstellar comet 3I/ATLAS exhibits unusual polarimetric properties compared with Solar System comets, while constraints on its fundamental physical properties, such as dust albedo and grain-size distribution, remain limited. We obtained new optical polarimetry near opposition with the Pirka Telescope, combined it with previously reported polarimetric measurements, and constructed a visible-to-mid-infrared spectral energy distribution (SED) from HST, VLT, SPHEREx, and JWST observations. The SED indicates that the coma is dominated by dark, absorbing dust, with an effective V-band albedo o…
- OpenAlex · Published · First archived
LGI-UNet: a robust semantic segmentation framework with local–global interaction for urban green space mapping in mountainous cities ↗
Urban green spaces (UGSs) must be accurately extracted to support refined urban management and sustainable development. However, UGSs in mountainous environments are scattered and exhibit multi-scale heterogeneity, hindering current deep learning-based segmentation methods. In response, this study constructed a novel semantic segmentation framework, the Local–Global Interaction Network (LGI-UNet), which designs a Difference-Aware Attention (DAA) module to model the differences between local features and global statistical context, thereby enhancing the discriminative representation of shaded a…
- OpenAlex · Published · First archived
Wave propagation and wrinkling localization in a prestressed periodic elastic half-space ↗
We investigate surface waves in a prestressed elastic half-space whose material properties are constant in the vertical direction but vary periodically along the direction of wave propagation. Using Floquet-Bloch theory, Fourier expansion, and the Stroh formalism, we reduce the dynamic problem to the solution of a matrix Riccati equation for a high-dimensional (truncated) surface impedance matrix. Illustrative results are presented for the case in which each unit cell consists of two homogeneous materials. A two-term asymptotic expression for the wave speed is derived for wavenumbers near the…
- Hacker News · Posted on Hacker News · First archived
Scorched Planets: "Scorched Earth" but in space with planetary gravity effects ↗
Hacker News discussion.
- arXiv · Published · First archived
The LOFAR Decametre Sky Survey (LoDeSS) I. Survey description and first data release ↗
The decametre radio sky ($\sim 10$-$30$ MHz) remains largely unexplored due to strong ionospheric distortions and severe radio-frequency interference. Despite its scientific potential, including access to steep-spectrum synchrotron emission from aged electron populations and coherent radio emission from planetary and stellar magnetospheres, sub-arcminute imaging at these frequencies has only recently become feasible with instruments such as the Low Frequency Array (LOFAR). In this work, we present the first data release (DR1) of the LOFAR decametre Sky Survey (LoDeSS), which maps the northern…
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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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