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.

October 06, 2025 Updates

How long does the human civilization need to last in order to observe another advanced intelligence in the Universe?
https://www.researchgate.net/publication/395989367_How_long_does_the_human_civilization_need_to_last_in_order_to_observe_another_advanced_intelligence_in_the_Universe

The Fermi Paradox Dissolved: Examining the Metaphysical Underpinnings of the Main Arguments Giving Rise to the Fermi Paradox
https://www.academia.edu/11899447/The_Fermi_Paradox_Dissolved_Examining_the_Metaphysical_Underpinnings_of_the_Main_Arguments_Giving_Rise_to_the_Fermi_Paradox

Optical Design Pathways to Fluidic Space-Assembled Reflectors & Dual-Configuration Spectrographs for Characterizing Exo-Earths
https://arxiv.org/abs/2510.02479

Habitable World Discovery and Characterization: Coronagraph Concept of Operations and Data Post-Processing
https://arxiv.org/abs/2510.02547

Exploring Warm Jupiter Migration Pathways with Eccentricities. I. Catalog of Uniform Keplerian Fits to Radial Velocities of 200 Warm Jupiters
https://arxiv.org/abs/2510.02564

Exploring Warm Jupiter Migration Pathways with Eccentricities II. Correlations with Host Star Properties and Orbital Separation
https://arxiv.org/abs/2510.02591

JCMT detection of HCN emission from 3I/ATLAS at 2.1 AU
https://arxiv.org/abs/2510.02817

Advancing the Concept Maturity Level of the Servicing Architecture for Habitable Worlds Observer
https://arxiv.org/abs/2510.03214

Blink and you’ll miss it – How Technological Acceleration Shrinks SETI’s Narrow Detection Window
https://www.sciencedirect.com/science/article/pii/S0094576525006538

Comparative Analysis of Polarization in Interstellar Comet 3I/ATLAS with Distant Solar System Comets
https://iopscience.iop.org/article/10.3847/2515-5172/ae0d91

Multi-band Spectral and Astrometric Characterization of the HIP 99770 b Planet with SCExAO/CHARIS and Gaia
https://iopscience.iop.org/article/10.3847/1538-3881/ae0195

Revisiting the Atmosphere of HD-149026 b: The Role of Stellar Abundances and Choice of Opacities in Exoplanet Atmosphere Modeling
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1671/8272721

October 3, 2025 updates

Novel Space Propulsion System Based on Cosmic Energy Inversion (CEIT) Theory: Theoretical Framework and Implementation Analysis
https://www.preprints.org/manuscript/202509.2209/v1

From the Big Bang to Wormhole Exits: Tenson Particles, Gravitational Wave Anomalies, and the Philosophy of Space-Time
https://philarchive.org/rec/NEMFTB

Beyond the Dark Forest: A Comprehensive Reassessment and Enhanced Theoretical Framework for Galactic Civilization Dynamics
https://zenodo.org/records/17252828

Astronomical observations with the Danish telescope at the ESO / La Silla observatory 2025
https://zenodo.org/records/17195336

Observation of undepleted phosphine in the atmosphere of a low-temperature brown dwarf
https://www.science.org/doi/10.1126/science.adu0401

Exomorphic Catalysis: A Discipline Dedicated to Energetic Disequilibria and the Activation of Life-Potential in Non-Terrestrial Environments
https://eartharxiv.org/repository/view/10225/

Multi-frequency observations of PDS70c: Radio emission mechanisms in the circumplanetary environment
https://www.aanda.org/articles/aa/full_html/2025/10/aa54485-25/aa54485-25.html

Global magnetohydrodynamic simulations of the inner regions of protoplanetary discs. I. Zero-net flux regime
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1672/8269933

The Intelligent Universe: AI’s Role in Astronomy
https://onlinelibrary.wiley.com/doi/book/10.1002/9781394355518

Electrical Resistivity of Liquid Fe-16S-2Si up to 13 GPa With Implications for the Adiabatic Heat Flux Through the Core of Exoplanet TRAPPIST-1h
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JE009203

ExoClock Project IV: A homogeneous catalogue of 620 updated exoplanet ephemerides
https://www.researchgate.net/publication/396161206_ExoClock_Project_IV_A_homogeneous_catalogue_of_620_updated_exoplanet_ephemerides

Solar Hegemony: M-Dwarfs Are Unlikely to Host Observers Such as Ourselves
https://arxiv.org/abs/2510.01215

Dynamical Excitation as a probe of planetary origins
https://arxiv.org/abs/2510.01332

Advancing Interstellar Science: A Global Framework for Comprehensive Study of Interstellar Objects
https://arxiv.org/abs/2510.01405

Investigating the need for a robust ultraviolet filter set aboard the Habitable Worlds Observatory
https://arxiv.org/abs/2510.02054

High Five From ASTEP: Three Validated Planets and Two Eclipsing Binaries in a Diverse Set of Long-Period Candidates
https://arxiv.org/abs/2510.01725

A Large Sample of JWST/NIRSpec Brown Dwarfs: New Distant Discoveries
https://arxiv.org/abs/2510.02026

Understanding the Origins of Super-Puff Planets: A New Mass-Loss Regime Coupled to Planetary Evolution
https://arxiv.org/abs/2510.02201

October 02, 2025 updates

Discovery of an Accretion Burst in a Free-floating Planetary-mass Object
https://iopscience.iop.org/article/10.3847/2041-8213/ae09a8

Using Venus, Earth, and Mars to Understand Exoplanet Volatile and Climate Evolution
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JE008882

Exoplanets beyond the Conservative Habitable Zone: I. Habitability
https://arxiv.org/abs/2510.00736

Exoplanets beyond the Conservative Habitable Zone: II. Occurrence
https://arxiv.org/abs/2510.00782

A planetary system with a sub-Neptune planet in the habitable zone of TOI-2093
https://arxiv.org/abs/2510.00299

Molecular Mobility of Extraterrestrial Ices: Surface Diffusion in Astrochemistry and Planetary Science
https://arxiv.org/abs/2510.01018

Redshifted civilizations, galactic empires, and the Fermi paradox
https://arxiv.org/abs/2510.00377

Technosignatures of Self-Replicating Probes in the Solar System
https://arxiv.org/abs/2510.00082

A Cold and Super-Puffy Planet on a Polar Orbit
https://arxiv.org/abs/2510.00102

What’s in Your Transit? Towards Reliably Getting 5x More Science from Exoplanet Transit Data
https://arxiv.org/abs/2510.00124

October 01, 2025 updates

Natural Philosophy of Protoplanetary and Planetary Discs: On the Origin and Evolution of Life
https://www.onlinescientificresearch.com/journals/jeesr/abstract/natural-philosophy-of-protoplanetary-and-planetary-discs-on-the–origin-and-evolution-of-life-6825.html

Artificial Broadcasts as Galactic Populations: III. Constraints on Radio Broadcasts from the Cosmic Population of Inhabited Galaxies
https://arxiv.org/abs/2508.00249

The CARMENES search for exoplanets around M dwarfs – Occurrence rates of Earth-like planets around very low-mass stars
https://www.aanda.org/articles/aa/full_html/2025/04/aa53381-24/aa53381-24.html

Testing the performance of cross-correlation techniques to search for molecular features in JWST NIRSpec G395H observations of transiting exoplanets
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf1659/8268886

A Scaling Law for the Orbital Architecture of Planetary Systems Formed by Gravitational Scattering and Collisions
https://iopscience.iop.org/article/10.3847/2041-8213/ae06fc

Water solubility in silicate melts: The effects of melt composition under reducing conditions and implications for nebular ingassing on rocky planets
https://www.sciencedirect.com/science/article/abs/pii/S0009254125004383

Combined Exoplanet Mass and Atmospheric Characterization for Accelerated Exoplanetology
https://arxiv.org/abs/2509.25323

Dynamical Architectures of S-type Transiting Planets in Binaries II: A Dichotomy in Orbital Alignment of Small Planets in Close Binary Systems
https://arxiv.org/abs/2509.25332

Multi-modal atmospheric characterization of β Pictoris b: Adding high-resolution continuum spectra from GRAVITY
https://arxiv.org/abs/2509.25338

The Open-Source Photochem Code: A General Chemical and Climate Model for Interpreting (Exo)Planet Observations
https://arxiv.org/abs/2509.25578

Revisiting the Atmosphere of HD 149026b: The Role of Stellar Abundances and Choice of Opacities in Exoplanet Atmosphere Modeling
https://arxiv.org/abs/2509.25785

Extreme NiI/FeI abundance ratio in the coma of the interstellar comet 3I/ATLAS
https://arxiv.org/abs/2509.26053

Architecture of planetary systems with and without outer giant planets I. Inner planet detections around HD 23079, HD 196067, and HD 86226
https://arxiv.org/abs/2509.26232

General Relativity Can Prevent a Runaway Greenhouse on Potentially Habitable Planets Orbiting White Dwarfs
https://arxiv.org/abs/2509.26421

Direct Measurement of Extinction in a Planet-Hosting Gap
https://arxiv.org/abs/2509.26617

September 30, 2025 updates

Beyond the Dark Forest: A Critical Analysis and Novel Extension of Liu Cixin’s Interstellar Civilization Theory
https://zenodo.org/records/17227223

A Two-Planet Problem with an Arbitrary Inclination of a Pair of Orbits. Secular Evolution of the Kepler-117 Exosystem
https://link.springer.com/article/10.1134/S1063772925702026

Modeling of Hot Jupiter HAT-P-32b and Transit Absorptions in Excited Hydrogen and Helium Atom Lines
https://link.springer.com/article/10.1134/S106377292570204X

Temporal evolution of the third interstellar comet 3I/ATLAS: Spin, color, spectra, and dust activity
https://www.aanda.org/articles/aa/full_html/2025/10/aa56717-25/aa56717-25.html

Competing chemical signatures in the atmosphere of TOI-270 d: Inference of sulfur and carbon chemistry
https://www.aanda.org/articles/aa/full_html/2025/09/aa55194-25/aa55194-25.html

The Formation of Ultra-short-period Planets under the Influence of the Nearby Planetary Companions
https://iopscience.iop.org/article/10.3847/1538-4357/adfdd1

Water Production Rates of the Interstellar Object 3I/ATLAS
https://iopscience.iop.org/article/10.3847/2041-8213/ae08ab

Revising core powered mass loss: A critical assessment of the “energy limited” argument
https://www.sciencedirect.com/science/article/abs/pii/S0019103525003756

Technique-agnostic exoplanet demography for the Roman era – I. Testing a retrieval framework using simulated Kepler-like transit datasets
https://arxiv.org/abs/2509.24401

Re-accretion of Giant Impact Ejecta Can Drive Significant Atmospheric Erosion on Terrestrial Planets
https://arxiv.org/abs/2509.22785

A Less Terrifying Universe? Mundanity as an Explanation for the Fermi Paradox
https://arxiv.org/abs/2509.22878

Shedding Light on Desert Dwellers
https://arxiv.org/abs/2509.22893

Coupled Planetary Interior and Tidal Evolution
https://arxiv.org/abs/2509.22923

HARPS-N Reveals a Well-aligned Orbit for the Highly Eccentric Warm Jupiter TOI-4127 b
https://arxiv.org/abs/2509.22972

How clear are the skies of WASP-80b?: 3D Cloud feedback on the atmosphere and spectra of the warm Jupiter
https://arxiv.org/abs/2509.23406

Blink and you’ll miss it – How Technological Acceleration Shrinks SETI’s Narrow Detection Window
https://arxiv.org/abs/2509.23632

Detection of OH and Fe in the dayside atmosphere of the hottest ultra-hot Jupiter KELT-9b with SPIRou
https://arxiv.org/abs/2509.23850

The Formation of Ultra-short-period Planets under the Influence of the Nearby Planetary Companions
https://arxiv.org/abs/2509.24199

Induction Heating in Super-Earths: A Thermochemical Perspective
https://arxiv.org/abs/2509.25092

Colors of Life in the Clouds: Biopigments of atmospheric microorganisms as a new signature to detect life on planets like Earth
https://arxiv.org/abs/2509.25173

Testing the Origin of Hot Jupiters with Atmospheric Surveys
https://arxiv.org/abs/2507.13446