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

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

September24, 2021 Updates

A Snowball in Hell: The Potential Steam Atmosphere of TOI-1266c

Charting nearby stellar systems: The intensity of Galactic cosmic rays for a sample of solar-type stars

The mass of Beta Pictoris c from Beta Pictoris b orbital motion

Precise Masses and Orbits for Nine Radial Velocity Exoplanets

The Population of Interstellar Objects Detectable with the LSST and Accessible for In Situ Rendezvous with Various Mission Designs

A molecular wind blows out of the Kuiper belt

The Solar System as an Exosystem: Planet Confusion

Two Bright M Dwarfs Hosting Ultra-Short-Period Super-Earths with Earth-like Compositions*

Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet

The dynamics of the TRAPPIST-1 system in the context of its formation

On the Fate of Interstellar Objects Captured by our Solar System

Evidence for stellar contamination in the transmission spectra of HAT-P-12b

Critical Analysis of TESS Transit Photometric Data: Improved Physical Properties for Five Exoplanets

The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part I: Dry Cases — The fellowship of the GCMs

The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part II: Moist Cases — The Two Waterworlds

The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part III: Simulated Observables — The return of the spectrum

The IRG Staff

September 23, 2021 Updates

Solar Neighborhood Exoplanet Host Stars within a Galactic Context

On the Demographics of Exoplanet Host Stars

Polarization Measurements of Selected Young Stars with Circumstellar Dusty Disks

Masses for free-floating planets and dwarf planets

Two Bright M Dwarfs Hosting Ultra-Short-Period Super-Earths with Earth-like Compositions

Radial-velocity Precision of ESPRESSO Through the Analysis of the Solar Twin HIP 11915

Intelligent responses to our technological signals will not arrive in fewer than three millennia

September 22, 2021 updates

Identifying Potential Exomoon Signals with Convolutional Neural Networks

Spitzer Phase-curve Observations and Circulation Models of the Inflated Ultrahot Jupiter WASP-76b

Astrobiology: Science, Ethics, and Public Policy

A New Type of Exoplanet Direct Imaging Search: The SCExAO/CHARIS Survey of Accelerating Stars

September 21, 2021 updates

GW Ori: circumtriple rings and planets

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. II. Discovery of a Failed Hot Jupiter on a 2.7 Yr, Highly Eccentric Orbit

Analyzing the Habitable Zones of Circumbinary Planets Using Machine Learning

A Uniform Search for Nearby Planetary Companions to Hot Jupiters in TESS Data Reveals Hot Jupiters are Still Lonely

Panspermia in a Milky Way-like Galaxy

TOI-1296b and TOI-1298b observed with TESS and SOPHIE: Two hot Saturn-mass exoplanets with different densities around metal-rich stars

Tidal migration of hot Jupiters. Introducing the impact of gravity wave dissipation

TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf

Two circumbinary planets in RR Cae eclipsing binary system

September 20, 2021 updates

Design of a Spacecraft Prototype for Interstellar Journey Using Existing Methods of Propulsion

The Problem of Micrometeorite Impacts in Relativistic Interstellar Journeys

Radius and Mass Distribution of Ultra-short-period Planets

Early Habitability and Crustal Decarbonation of a Stagnant-Lid Venus

Nonlinear simulations of tides in the convective envelopes of low-mass stars and giant gaseous planets

Exploring Deep, Hot, Adiabats as a Potential Solution to the Radius Inflation Problem in Brown Dwarfs: Long Timescale Models of the Deep Atmospheres of KELT-1b, Kepler-13Ab, and SDSS1411B

Stellar Gravitational Lens Engineering for Interstellar Communication and Artifact SETI

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