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.

January 30, 2026 updates

Spatial distribution of organics in the Horsehead nebula: signposts of chemistry driven by atomic carbon
https://arxiv.org/abs/2601.20146

H182O in the terrestrial planet-forming regions of protoplanetary disks
https://arxiv.org/abs/2601.20096

The Origin, Extension, and Future of the “NASA Definition” of Life
https://journals.sagepub.com/doi/10.1177/15311074251412317

The Microbial Inhabitants of the Corona Lava Tube: Astrobiological Insights from a Mars Analog Environment
https://journals.sagepub.com/doi/10.1177/15311074251413229

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS): I. Motivation, sample, data reduction, and results overview
https://www.aanda.org/articles/aa/full_html/2026/01/aa56489-25/aa56489-25.html

Transit distances and composition of low-velocity exocomets in the β Pic system
https://arxiv.org/abs/2601.15216

Microgravity-induced constraints on melanin bioproduction: investigating E. coli metabolic responses aboard the International Space Station
https://www.nature.com/articles/s41526-026-00560-w

Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): V721 CrA and BN CrA have wide and structured disks in the polarised infrared
https://www.aanda.org/articles/aa/full_html/2026/02/aa56331-25/aa56331-25.html

The power of polarimetry for characterising exoplanet atmospheres, clouds, and surfaces with NASA’s Habitable Worlds Observatory
https://arxiv.org/abs/2601.20902

The Third Option: Color Phase Curves to Characterize the Atmospheres of Temperate Rocky Exoplanets
https://arxiv.org/abs/2601.20966

Balancing Variety and Sample Size: Optimal Parameter Sampling for Ariel Target Selection
https://arxiv.org/abs/2601.21020

Thermal emission spectra of the ultra-hot Jupiter WASP-33 b
https://arxiv.org/abs/2601.21072

A Comprehensive Network for the Discovery and Characterization of Interstellar Objects
https://arxiv.org/abs/2601.21184

Coupled thermal-chemical evolution models of sub-Neptunes reveal atmospheric signatures of their formation location
https://arxiv.org/abs/2601.21377

Nucleus and Postperihelion Activity of Interstellar Object 3I/ATLAS Observed by Hubble Space Telescope
https://arxiv.org/abs/2601.21569

Hidden Gems in TESS: sherlock finds two new rocky planets around nearby M dwarfs
https://arxiv.org/abs/2601.21774

Critical Evaluation of Studies Alleging Evidence for Technosignatures in the POSS1-E Photographic Plates
https://arxiv.org/abs/2601.21946

The Volatile Inventory of 3I/ATLAS as seen with JWST/MIRI
https://arxiv.org/abs/2601.22034

Densities of small planets around the M dwarfs TOI-4336 A and TOI-4342 with ESPRESSO: Three sub-Neptunes, one super-Earth, and a Neptune-mass candidate
https://arxiv.org/abs/2601.22115

High-Pressure Torsion-Induced Transformation of Adenosine Monophosphate: Insights into Prebiotic Chemistry of RNA by Astronomical Impacts
https://arxiv.org/abs/2601.21378

Global outreach and cultural impact of A Sign in Space, an interdisciplinary simulation of a first contact scenario
https://www.sciencedirect.com/science/article/abs/pii/S0094576526000421

Halotolerant bacteria from mangrove and restinga ecosystems in Camocim, Brazil: astrobiological relevance and biotechnological potential
https://pubmed.ncbi.nlm.nih.gov/41455854/

Broadband, High-Reflectivity Dielectric Mirrors at Wafer Scale: Combining Photonic Crystal and Metasurface Architectures for Advanced Lightsails
https://pubs.acs.org/doi/10.1021/acs.nanolett.4c01374

Antimatter rockets and interstellar propulsion
https://arc.aiaa.org/doi/10.2514/6.1993-2007

A systematic review of the cerebrovascular adaptations following exposure to spaceflight or ground-based analogs: lessons from human and animal studies
https://www.nature.com/articles/s41526-025-00540-6

The effect of space travel on human reproductive health: a systematic review
https://www.nature.com/articles/s41526-024-00351-1

Effect of microgravity on the feasibility and accuracy of dental procedures
https://www.nature.com/articles/s41526-025-00552-2

Effects of microgravity mechanotransduction in bone tissue and cells: systematic review on primary cilium-dependent mechanisms
https://www.nature.com/articles/s41526-025-00556-y

A Closed-form Analytical Theory of Nonisobaric Transmission Spectroscopy for Exoplanet Atmospheres
https://iopscience.iop.org/article/10.3847/1538-4357/ae3246

Developing the SNRAS Metric: Enhancing the Reliability of Exoplanet Detection in Heteroscedastic Light Curves Vetting Heteroscedastic Light Curves in Kepler and TESS Data
https://www.researchgate.net/publication/400103399_Developing_the_SNRAS_Metric_Enhancing_the_Reliability_of_Exoplanet_Detection_in_Heteroscedastic_Light_Curves_Vetting_Heteroscedastic_Light_Curves_in_Kepler_and_TESS_Data

The SCG-HMH + Spaceship TITAN integration: A Regenerative, Self-Sustaining Starship Powered by Recycled Entropy and Stellar Heat (conceptual design – not a working prototype)
https://zenodo.org/records/18430289

Sustainable Energy in Space Exploration: Challenges and Potentials
https://www.researchgate.net/publication/374002217_Sustainable_Energy_in_Space_Exploration_Challenges_and_Potentials

Spin Concept Propulsion for Reactionless Interstellar Travel
https://www.academia.edu/143197891/Spin_Concept_Propulsion_for_Reactionless_Interstellar_Travel

January 29, 2026 updates

3I/ATLAS: More Mathematical Correlations with the Earth’s 24-hour Rotational Cycle and the Bizarre Symmetry of its Tripartite Jet Structure
https://www.researchgate.net/publication/400024652_3IATLAS_More_Mathematical_Correlations_with_the_Earth’s_24-hour_Rotational_Cycle_and_the_Bizarre_Symmetry_of_its_Tripartite_Jet_Structure

The View From Pluto: Humanity’s Pathway to A Multi-World Civilisation
https://works.hcommons.org/records/q7vb8-33a47

NASA exoplanet probe tracks interstellar comet 3I/ATLAS to gauge its spin
https://www.space.com/astronomy/comets/nasa-exoplanet-probe-tracks-interstellar-comet-3i-atlas-to-gauge-its-spin

Novel quantitative push gravity/field theory poised for verification
https://zenodo.org/records/18411867

An observationally based wind model contemporaneous with the radio detections in τ Boötis
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/staf2070/8443345

The K-dwarfs Survey I. Four Validated Planets from the Radius Valley to the Neptune Desert
https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag183/8442244

Fractal Aggregate Aerosols in the Virga Cloud Code. II. Exploring the Effects of Key Cloud Parameters in Warm Neptune, Hot Jupiter and Brown Dwarf Atmospheres
https://iopscience.iop.org/article/10.3847/1538-4357/ae2752

Stellar and orbital characterization of three low mass M dwarf binary stars with dynamical spectroscopy from the Habitable Zone Planet Finder
https://arxiv.org/abs/2601.19996

Exomoons and Exorings with the Habitable Worlds Observatory II: Finding Endor with Lunar Eclipses
https://arxiv.org/abs/2601.20002

Orbital stability of compact three-planet systems III. The role of three-body resonances
https://arxiv.org/abs/2601.20220

Self-consistent N-body simulation of Planetesimal-Driven Migration. II. The effect of PDM on planet formation from a planetesimal disk
https://arxiv.org/abs/2601.20348

The RoPES project with HARPS and HARPS-N II. A third planet in the multi-planet system HD 176986
https://arxiv.org/abs/2601.20559

Climates of Terrestrial Exoplanets and Biosignatures
https://arxiv.org/abs/2601.20620

January 28, 2026 updates

The detection of circularly polarized radio bursts from stellar and exoplanetary systems
https://www.nature.com/articles/s41550-025-02757-7

Enriched volatiles and refractories but deficient titanium on the day-side
https://www.aanda.org/articles/aa/full_html/2026/02/aa56985-25/aa56985-25.html

Heavy-element-enriched atmospheres and where they are born
https://www.aanda.org/articles/aa/full_html/2026/02/aa56898-25/aa56898-25.html

Extreme Winds on the Emerging Dayside of an Ultrahot Jupiter
https://iopscience.iop.org/article/10.3847/2041-8213/ae36a1

Towards a Comprehensive Understanding of Planetary Systems through Population-Level, Large-Scale Surveys
https://arxiv.org/abs/2601.18841

Evidence for a Peak at 0.3 in the Eccentricity Distribution of Typical Super-Jovian Exoplanets
https://arxiv.org/abs/2601.18877

The MIRI Excess around Degenerates (MEAD) Survey II: A Probable Planet detected via IR Excess around WD 0644+025
https://arxiv.org/abs/2601.18965

Predicted incidence of Jupiter-like planets around white dwarfs
https://arxiv.org/abs/2601.19531

Beyond solar metallicity: How enhanced solid content in disks re-shape low-mass planet torques
https://arxiv.org/abs/2601.19584

January 27, 2026 updates

The SCG-HMH Spaceship: A Regenerative, Self-Sustaining Starship Powered by Recycled Entropy and Stellar Heat (conceptual design – not a working prototype)
https://zenodo.org/records/18382317

The mass density of interstellar objects in the Solar neighbourhood and its Galactic implications
https://zenodo.org/records/18346998

Possible favored great oxidation event scenario on exoplanets around M-stars with the example of TRAPPIST-1e
https://link.springer.com/article/10.1038/s41598-026-37144-3

Cosmic–climatic futures: interstellar objects, solar variability, and planetary consciousness (2027–2032)
https://link.springer.com/article/10.1186/s40309-026-00264-0

Rapid Response Missions to Interstellar Objects Using Lyapunov Wait-in-Orbit Constellations
https://arc.aiaa.org/doi/10.2514/1.A36446

The SPIRou Legacy Survey: Detection of a nearby world orbiting in the habitable zone of Gl 725B achieved by correcting strong telluric contamination in near-infrared radial velocities with wapiti https://www.aanda.org/articles/aa/full_html/2026/01/aa55469-25/aa55469-25.html

SPIRou detects two planets around the nearby M4.5V star GJ 4274
https://www.aanda.org/articles/aa/full_html/2026/01/aa57666-25/aa57666-25.html

Tighter constraints on the atmosphere of GJ 436 b from combined high-resolution CARMENES and CRIRES+ observations
https://www.aanda.org/articles/aa/full_html/2026/01/aa57570-25/aa57570-25.html

A Cool Earth-sized Planet Candidate Transiting a Tenth Magnitude K-dwarf From K2
https://iopscience.iop.org/article/10.3847/2041-8213/adf06f

Modeling the Impact of Unresolved Stellar Companions on Detection Sensitivity in Kepler’s Small-planet Occurrence Rates
https://iopscience.iop.org/article/10.3847/1538-3881/ae2ead

Post-Perihelion Integral Field Spectroscopy of the Interstellar Comet 3I/ATLAS
https://arxiv.org/abs/2601.16983

Exoplanets beyond the Conservative Habitable Zone. I. Habitability
https://iopscience.iop.org/article/10.3847/1538-4357/ae21d7

Effect of different Non-Gravitational accelerations on the trajectory of Interstellar Comet 3I/ATLAS
https://arxiv.org/abs/2601.17083

Evolution of Stellar Activity and Habitable Zone II: Ca H&K Emissions of Late-type Dwarfs
https://arxiv.org/abs/2601.17715

Atmospheric Circulation of High-Obliquity Mini-Neptunes
https://arxiv.org/abs/2601.18606

The Role of Intrinsic Temperature and Vertical Mixing in Characterizing Sub-Neptune Atmospheres
https://arxiv.org/abs/2601.18769

Probing thermal gradients of habitable-zone rocky planets as an anti-indicator of a global surface ocean using mid-infrared direct imaging
https://arxiv.org/abs/2512.16575

January 26, 2026 Updates

Dynamical Constraints and Volatile Composition of the Interstellar Object 3I/ATLAS (C/2025 N1): Evidence for a Carbon-Rich Progenitor
https://www.researchgate.net/publication/399879827_Dynamical_Constraints_and_Volatile_Composition_of_the_Interstellar_Object_3IATLAS_C2025_N1_Evidence_for_a_Carbon-Rich_Progenitor

Zooming into the water snow line: High-resolution water observations of the HL Tau disk
https://www.aanda.org/articles/aa/full_html/2026/01/aa57609-25/aa57609-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) I. Motivation, sample, data reduction, and results overview
https://www.aanda.org/articles/aa/full_html/2026/01/aa56489-25/aa56489-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) II. The radial structure of debris discs
https://www.aanda.org/articles/aa/full_html/2026/01/aa56450-25/aa56450-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) III. The vertical structure of debris disks
https://www.aanda.org/articles/aa/full_html/2025/11/aa54463-25/aa54463-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) IV. CO gas imaging and overview
https://www.aanda.org/articles/aa/full_html/2026/01/aa56605-25/aa56605-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) V. Comparison between scattered light and thermal emission
https://www.aanda.org/articles/aa/full_html/2026/01/aa56523-25/aa56523-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) VI. Asymmetries and offsets
https://www.aanda.org/articles/aa/full_html/2026/01/aa56568-25/aa56568-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) VII. Optically thick gas with broad CO gaussian local line profiles in the HD 121617 disc
https://www.aanda.org/articles/aa/full_html/2026/01/aa56566-25/aa56566-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) VIII. A dust arc and non-Keplerian gas kinematics in HD 121617
https://www.aanda.org/articles/aa/full_html/2026/01/aa56493-25/aa56493-25.html

The ALMA survey to Resolve exoKuiper belt Substructures (ARKS) IX. Gas-driven origin for the continuum arc in the debris disc of HD121617
https://www.aanda.org/articles/aa/full_html/2026/01/aa56855-25/aa56855-25.html

SPIRou detects two planets around the nearby M4.5V star GJ 4274
https://www.aanda.org/articles/aa/full_html/2026/01/aa57666-25/aa57666-25.html

The MATISSE view of the inner region of the RY Tau protoplanetary disk
https://www.aanda.org/articles/aa/full_html/2026/01/aa55717-25/aa55717-25.html

How two-dimensional are planet–disc interactions? II. Radiation hydrodynamics and suitable cooling prescriptions
https://www.aanda.org/articles/aa/full_html/2026/01/aa57399-25/aa57399-25.html

The coupled tidal evolution of the moons and spins of warm exoplanets
https://www.aanda.org/articles/aa/full_html/2026/01/aa55433-25/aa55433-25.html

Extended Spin-Orbit Modeling of Unstable Discrete Fractional Hamiltonian Systems: Numerical Investigation of Chaotic Orbits for Mercury, Mars, Triton, and Sedna-like Trans-Neptunian Objects
https://www.sciencedirect.com/science/article/abs/pii/S0273117726000839

OUR SOLAR SYSTEM IS WEIRD
https://www.sciencedirect.com/science/article/abs/pii/S0262407926001533

Rare Near-opposition Alignment of 3I/ATLAS on 2026 January 22
https://iopscience.iop.org/article/10.3847/2515-5172/ae3a77

A mantle assist for the early geodynamo and planetary shielding
https://academic.oup.com/nsr/advance-article/doi/10.1093/nsr/nwag046/8439531?searchresult=1

Evolutions of mean distance ratios in the planetary and satellite systems under primary tides and nebular gas drag effects
https://arxiv.org/abs/2601.16245

Assessing the Vera Rubin Observatory’s Ability to Discover Asteroid Impactors Before They Collide with Earth
https://arxiv.org/abs/2601.16255

TOI-6692b: An eccentric 130 day period giant planet with a single transit from TESS
https://arxiv.org/abs/2601.16357

Mercury-Arχes: a high-performance n-body code for planet formation studies
https://arxiv.org/abs/2601.16791

The Origins of Planets for ArieL (OPAL) Key Science Project: the end-to-end planet formation campaign for the ESA space mission Ariel
https://arxiv.org/abs/2601.16841

Post-Perihelion Integral Field Spectroscopy of the Interstellar Comet 3I/ATLAS
https://arxiv.org/abs/2601.16983