Interstellar Updates

 

These are items of interest to the interstellar exploration community that we’ve found in our quest for information that will help us advance toward our goals.  If you know of anything we’ve overlooked, or any sources of such information we should monitor, or if you would like to be added to our IRG-updates mailing list and receive these updates in you email every weekday, please send that information to info@irg.space.

You can now search our database of interstellar updates and find items of interest to you.

November 14, 2025 updates

The Fatal Absence of Extraterrestrial Intelligence and its Consequence for Humanity
https://www.academia.edu/112128873/The_Fatal_Absence_of_Extraterrestrial_Intelligence_and_its_Consequence_for_Humanity

Radio burst from a stellar coronal mass ejection
https://www.nature.com/articles/s41586-025-09715-3

Life in Space
Astrobiology for Nonscientists
https://link.springer.com/book/10.1007/978-3-031-64639-3

Distant Trans-Neptunian Objects in the Solar System with Additional Outer Planets
https://link.springer.com/article/10.1134/S1063772925702191

Understanding JWST water spectra: What can thermochemical models tell us about the (cold) water in protoplanetary disks?
https://www.aanda.org/articles/aa/full_html/2025/11/aa55809-25/aa55809-25.html

A planetary system with a sub-Neptune planet in the habitable zone of TOI-2093
https://www.aanda.org/articles/aa/full_html/2025/11/aa56361-25/aa56361-25.html

A decade of transit photometry for K2-19: Revised system architecture
https://arxiv.org/abs/2510.01985

The interstellar object significance scale (Loeb Scale): astronomical classification of interstellar objects
https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/interstellar-object-significance-scale-loeb-scale-astronomical-classification-of-interstellar-objects/33F927C9600721DF14D1AA8525D7EDC0

Machine-learning analysis of solar flare light-curve morphology and implications for stellar CME prediction
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf2018/8323165

Using simultaneous mass accretion and external photoevaporation rates for d203-504 to constrain disc evolution processes
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf2015/8323173

The Influence of Tight Binaries on Protoplanetary Disk Masses
https://iopscience.iop.org/article/10.3847/1538-3881/ae112b

A Near-infrared Spectral Library of Very Young Brown Dwarfs and Planetary Mass Objects in the Orion Nebula Cluster
https://iopscience.iop.org/article/10.3847/1538-4357/ae0a29

Order-by-order Modeling of Exoplanet Radial Velocity Data
https://iopscience.iop.org/article/10.1088/1538-3873/ae1640

Accurate position tracking control of SMA actuators in space deployable structure
https://iopscience.iop.org/article/10.1088/1361-665X/ae1bec

Exploring Fermi’s Paradox using an intragalactic colonization model
https://www.sciencedirect.com/science/article/abs/pii/S0094576525007593

The Effect of Composition on Shear Localization in Planetary Lithospheres
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JE009106

3I/ATLAS as an Interplanetary Cosmobiont: A Hypothesis on Intelligent Plasma Organisms in Interstellar Motion
https://www.researchgate.net/publication/397626979_3IATLAS_as_an_Interplanetary_Cosmobiont_A_Hypothesis_on_Intelligent_Plasma_Organisms_in_Interstellar_Motion

EMPEROR. I. Exoplanet MCMC parallel tempering for RV orbit retrieval
https://www.researchgate.net/publication/397611342_EMPEROR_I_Exoplanet_MCMC_parallel_tempering_for_RV_orbit_retrieval

Detecting Evolutionary Climate Patterns In Early Universe Exoplanet Analogues
https://www.researchgate.net/publication/397561228_Detecting_Evolutionary_Climate_Patterns_In_Early_Universe_Exoplanet_Analogues

Fundamentals of interior modelling and challenges in the interpretation of observed rocky exoplanets
https://www.researchgate.net/publication/397596105_Fundamentals_of_interior_modelling_and_challenges_in_the_interpretation_of_observed_rocky_exoplanets

Analyzing Exoplanet Transits Observed with the WFC3/UVIS G280 Grism
https://www.researchgate.net/publication/397595536_Analyzing_Exoplanet_Transits_Observed_with_the_WFC3UVIS_G280_Grism

Planetary architectures under the influence of a stellar binary
https://arxiv.org/abs/2511.09676

PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). IV. High-Resolution Phased-Resolved Spectroscopy of The Ultra Hot Jupiter KELT-20 b
https://arxiv.org/abs/2511.09720

True spin-orbit obliquities distribution: data-driven confirmation of no clustering of misaligned planets
https://arxiv.org/abs/2511.10313

ASASSN-24fw: Candidate circumplanetary disk occultation of a main-sequence star
https://arxiv.org/abs/2507.05367

November 13, 2025 updates

Astrobiology and Planetary Sciences in Latin America
https://link.springer.com/book/10.1007/978-3-032-01450-4

System Analysis for a high-precision high-accuracy Astrometric instrument for HWO
https://arxiv.org/abs/2511.07113

Interstellar comet 3I/ATLAS (aka C/2025 N1 ATLAS): the ion tail is getting longer
https://www.virtualtelescope.eu/2025/11/11/interstellar-comet-3i-atlas-aka-c-2025-n1-atlas-the-ion-tail-is-getting-longer-11-nov-2025/

Evidence for the Keplerian orbit of a close companion around a giant star
https://link.springer.com/article/10.1038/s41550-025-02697-2

Life in Space: Astrobiology for Nonscientists
https://link.springer.com/book/10.1007/978-3-031-64639-3

The possibility of hydrogen-water demixing in Uranus, Neptune, K2-18 b and TOI-270 d
https://www.aanda.org/articles/aa/full_html/2025/11/aa56322-25/aa56322-25.html

New migration patterns in high planet–star mass ratio systems in discs with low viscosity
https://www.aanda.org/articles/aa/full_html/2025/11/aa55041-25/aa55041-25.html

Direct Spectroscopy of 51 Eridani b with JWST NIRSpec
https://iopscience.iop.org/article/10.3847/1538-3881/ae1028

No TiO detected in the hot Neptune-desert planet LTT-9779 b in reflected light at high spectral resolution
https://arxiv.org/abs/2511.08691

CoronaGraph Instrument Reference stars for Exoplanets (CorGI-REx) I. Preliminary Vetting and Implications for the Roman Coronagraph and Habitable Worlds Observatory
https://arxiv.org/abs/2511.08862

Abiogenesis on Different Star Types; a Dissipative Photochemical Perspective
https://arxiv.org/abs/2511.08624

Second Generation Planet Formation in Post-AGB Discs: Testing the Role of Gravitational Instability
https://arxiv.org/abs/2509.03894

November 12, 2025 updates

General Circulation Models of Hycean Worlds
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1948/8321669

HARPS-N, TESS, and CHEOPS† discover a transiting sub-Neptune and two outer companions around the bright solar analogue HD 85426
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1934/8321677

Lithological Controls on Aqueous Phosphorus on Ocean-covered Exoplanets
https://iopscience.iop.org/article/10.3847/PSJ/ae0d84

Searching for Exoplanets Born Outside the Milky Way: VOYAGERS Survey Design
https://arxiv.org/abs/2511.07632

Non-Gravitational Acceleration in 3I ATLAS: Constraints on Exotic Volatile Outgassing in Interstellar Comets
https://arxiv.org/abs/2511.07450

Dust Recycling and Icy Volatile Delivery (DRIVE): A Novel Method of Volatile Enrichment in Cold Giant Planets
https://arxiv.org/abs/2511.07590

A Closed-Form Analytical Theory of Non-Isobaric Transmission Spectroscopy for Exoplanet Atmospheres
https://arxiv.org/abs/2511.07656

“Popcorn Planets” are Not Actively Inflated by Eccentricity Tides
https://arxiv.org/abs/2511.07746

An Overview of Exocomets
https://arxiv.org/abs/2511.08270

The Exoplanet Edge: Planets Don’t Induce Observable TTVs with a Dominant TTV Period Faster than Half their Orbital Period
https://arxiv.org/abs/2411.09752

Using Stellar Spectral Energy Distributions to Measure Exoplanet Parameters
https://arxiv.org/abs/2511.07536

November 11, 2025 updates

The Discovery Plateau Hypothesis: a Unified Theory of Knowledge Limits, Multiverse Simulation Reality, and Synthetic Data Harvesting
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5173153

3I/ATLAS – Estimation of the Closest Approach Using Raw JPL Data and the 72 φ-bit Trinamic Metric
https://zenodo.org/records/17541602

China’s Tianwen-1 Mars orbiter captures image of interstellar object older than the solar system
https://news.cgtn.com/news/2025-11-06/China-s-Mars-orbiter-observes-interstellar-object-3I-ATLAS-1I4DnY6fada/p.html

The interstellar object significance scale (Loeb Scale): astronomical classification of interstellar objects
https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/interstellar-object-significance-scale-loeb-scale-astronomical-classification-of-interstellar-objects/33F927C9600721DF14D1AA8525D7EDC0

PLATOSpec: a precise spectrograph in support of space missions
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1972/8317931

THYME. XIII. Two Young Neptunes Orbiting a 75 Myr Star in the Alpha Persei Cluster
https://iopscience.iop.org/article/10.3847/1538-3881/ae0a35

Preperihelion Development of Interstellar Comet 3I/ATLAS
https://iopscience.iop.org/article/10.3847/2041-8213/ae1832

Searching for Free-floating Planets with TESS: Results from Sectors 61–65
https://iopscience.iop.org/article/10.3847/1538-3881/ae10ab

An Independent Search for Small Long-period Planets in Kepler Data. I. Detection Pipeline
https://iopscience.iop.org/article/10.3847/1538-3881/adfc50

Interstellar Object 3I/ATLAS: Post-Perihelion Evolution, Spectral Variability, and Implications for Extraterrestrial Matter Exchange
https://zenodo.org/records/17565918

Transiting Exoplanets from Sharjah Astronomical Observatory (SAO-M47): The Exoplanet HAT-P-25b Using L and V Filters
https://arxiv.org/abs/2511.04396

EMPEROR I. Exoplanet MCMC parallel tempering for RV orbit retrieval
https://arxiv.org/abs/2511.05331

Are We There Yet? Challenges in Quantifying the Frequency of Earth Analogs in the Habitable Zone
https://arxiv.org/abs/2511.05660

Three New Light Curves and Updated Transit Timings of WASP-135 b
https://arxiv.org/abs/2511.06015

Dust distribution in circumstellar disks harboring multi-planet systems. I. Sub-thermal mass planets
https://arxiv.org/abs/2511.06050

A Firefly-inspired Model for Deciphering the Alien
https://arxiv.org/abs/2511.06139

November 10, 2025 Updates

Large Scale Directed Energy: The Path to Radical Transformation in Propulsion
https://www.deepspace.ucsb.edu/projects/starlight

The Unfolding of Time: A Logarithmic Model for Astronomical, Biological, and Cultural Evolution
https://www.academia.edu/143991400/The_Unfolding_of_Time_A_Logarithmic_Model_for_Astronomical_Biological_and_Cultural_Evolution

Energy needed to propel a tiny spacecraft to Proxima Centauri
https://pubs.aip.org/aapt/ajp/article/93/11/874/3368439

Radiation Hydrodynamics of Self-gravitating Protoplanetary Disks: I. Direct Formation of Gas Giants via Disk Fragmentation
https://arxiv.org/abs/2510.19915

The Extraterrestrial Contact Window
https://www.academia.edu/129000327/The_Extraterrestrial_Contact_Window

Space Travel to the Edge of the Universe in Just 44 Years
http://ahadi.de/space_travel.pdf

Volatile distribution inversion and rotation analysis of comet 103P/Hartley 2 using nongravitational effects
https://www.aanda.org/articles/aa/full_html/2025/11/aa54487-25/aa54487-25.html

Traversable wormholes admitting non-exotic fluid: Implications of different equations of state in torsion-based gravity
https://www.sciencedirect.com/science/article/pii/S2212686425003516

Detectability of Atmospheric Climate and Biosignatures with the Large Interferometer for Exoplanets (LIFE) for terrestrial-type Exoplanets
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1878/8317168

Precise mass and radius determination for two new and one known Neptune-sized planets around G Dwarf hosts
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1958/8317175

Mass determination of the three long-period Neptune- and sub-Neptune-sized planets transiting TOI-282
https://arxiv.org/abs/2511.05147

Upper limits on atmospheric abundances of KELT-11b and WASP-69b from a retrieval approach
https://arxiv.org/abs/2511.05154

Multiplicity of stellar systems in the solar neighbourhood, wide binaries, and planet-hosting stars
https://arxiv.org/abs/2511.05248

Upper Limits on Radio Emission from the K2-18 System
https://arxiv.org/abs/2511.05427