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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 ↗524 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.
- arXiv · Published · First archived
LoFreq-SETI: A Low-Frequency Technosignature Search Pipeline for the LWA Swarm ↗
The search for extraterrestrial intelligence (SETI) is conducted across the electromagnetic spectrum to understand the prevalence and distribution of intelligent life in the universe. At radio frequencies, this effort focuses on searching for "technosignatures", observable indicators of technological activity consistent with our understanding of an advanced civilization. Historically, the microwave regime from 1-10 GHz has been the primary frequency range searched for these technosignatures, but recent SETI experiments utilizing low-frequency radio telescopes, such as the Low Frequency Array (…
- arXiv · Published · First archived
A forest of emission lines observed by Sunrise III/SUSI above the solar limb ↗
We present off-limb spectroscopy using low-straylight data from the Sunrise Spectropolarimeter and Imager (SUSI) onboard the Sunrise III stratospheric solar observatory. A spatial scan with SUSI's slit almost parallel to the local limb reached from within the solar disc to 6.5 Mm off-limb. The wavelength range spanned from 407.6 to 410.25 nm. We detected a total of 174 spectral lines in emission off-limb, a 2.5-fold increase over previous reports. Surprisingly, 122 of these lines begin to appear in emission already on the disc, although close to the limb. In addition, one-fifth of relatively p…
- arXiv · Published · First archived
Closing the Gap: A Test of the Streaming Instability Using Simulations and Observations of the Cold-Classical Kuiper Belt Size Distribution ↗
How planetesimals form is a major open question in studies of planet formation, as the growth of smaller solids must overcome barriers such as radial drift, fragmentation, and bouncing. The leading model is that planetesimals form by the gravitational collapse of dense particle clumps that have been aerodynamically collected via a process known as the streaming instability (SI). While the SI has passed several observational tests, a critical test remains: a successful comparison with the size distribution of Solar System planetesimals. In this work, we conducted a series of SI simulations for…
- arXiv · Published · First archived
AEGIS: Differentiable Mars Climate Model with Neural Closures ↗
General circulation models (GCMs) are the primary tool for simulating planetary atmospheres. They play a vital role in understanding Mars's atmosphere, as forecasting its unique weather is mission-critical for operations such as entry, descent, and landing. Mars poses unusual challenges for these models, as observations are sparse compared to Earth. In addition, a thin \co{} atmosphere alongside a radiatively active dust cycle creates a volatile atmosphere with large diurnal temperature swings and no true terrestrial analog for validation. Existing Mars GCMs, including the LMD PCM, the NASA Am…
- arXiv · Published · First archived
Measuring the Age and Initial Composition of Interstellar Objects ↗
Measuring the age and composition of interstellar objects is necessary to understand their origins. However, existing methods for measuring the age are either imprecise or require an unusually bright target, while the composition is confounded by the effects of Galactic cosmic rays, which drive chemical reactions in the cometary matrix. As the Vera C. Rubin Observatory expands the census of interstellar objects, measuring these properties will be critical to understanding the overall population. In this work, I derive a new methodology for simultaneously estimating the age and initial composit…
- NASA · Source date · First archived
NASA Astronaut Christina Koch to Join NFL Fans in Philadelphia ↗
NASA astronaut Christina Koch is seen during an event to award the Congressional Space Medal of Honor to the Artemis II crew, Friday, Aug. 28, 2026, at the agency’s Johnson Space Center in Houston. Credit: NASA/John Kraus As part of NASA’s ongoing Inspiration Tour, NASA astronaut Christina Koch will highlight America’s strengths in space exploration and aeronautics innovation at the Philadelphia Eagles vs. Los Angeles Rams game in Philadelphia on Sunday, Oct. 4. A self-proclaimed Philadelphia sports fan, Koch is an explorer and engineer who spent a total of 338 days in space across two mission…
- Hacker News · Posted on Hacker News · First archived
InterstellOr's Space Tourism Capsule Makes Progress, Books More Customers ↗
Hacker News discussion.
- arXiv · Published · First archived
The Nearest, Brightest Debris Disk Host Stars: Updated Photosphere Models and Dust Properties for Stars with Saturated 2MASS Photometry ↗
To discover and characterize debris disks, one must obtain high-quality photometry in order to accurately fit photosphere models for the host stars. Since the $K$ band always falls on the Rayleigh-Jeans side of a star's spectral energy distribution (SED), its reliability is particularly important for uncovering mid-infrared excess emission from dust. While Two Micron All Sky Survey (2MASS) photometry is the near-infrared benchmark for most stars that host debris disks discovered by Spitzer and the Wide Field Infrared Survey Explorer (WISE), the brightest stars ($K_s < 5$) saturated the 2MASS d…
- NASA · Source date · First archived
Heading Home: NASA’s SpaceX Crew-12 Concludes Station Science Mission ↗
5 Min Read Heading Home: NASA’s SpaceX Crew-12 Concludes Station Science Mission NASA’s SpaceX Crew-12 mission is ending, with the crew scheduled to return in early October. NASA astronauts Jessica Meir and Jack Hathaway, ESA (European Space Agency) astronaut Sophie Adenot, and Roscosmos cosmonaut Andrey Fedyaev will head home from the International Space Station after supporting research that benefits life on Earth and prepares humans for missions into deep space. Here’s a look back at some of their accomplishments: Orbital transit NASA/ESA The crew members look out the window of a Dragon spa…
- NASA · Source date · First archived
NASA’s DAVINCI Probe Can Stand the Heat ↗
An engineering model of NASA’s DAVINCI (Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging) descent probe passed a key test that ran from Aug. 28 to Sept. 10, showing it can survive the extreme temperatures of Venus. NASA/Mike Guinto The engineering development unit for NASA’s DAVINCI (Deep Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging) probe is photographed prior to a major thermal evaluation. The DAVINCI team put the yoga ball-sized vessel into a ceramic-lined chamber with heat-scorched walls and ratcheted up the temperature to 869 F, or 465 C,…
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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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