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.

March 31, 2021 updates

Unusual polarimetric properties for interstellar comet 2I/Borisov

The Diversity of Planetary Atmospheric Chemistry

General Observer Programs in Cycle 1 (JWST)

Hot Jupiters, cold kinematics: High phase space densities of host stars reflect an age bias

Tilting Planets During Planet Scattering

Calibration of residual aberrations in exoplanet imagers with large numbers of degrees of freedom

Spin Dynamics of Extrasolar Giant Planets in Planet-Planet Scattering

On the multiscale behaviour of stellar activity and rotation of the planet host Kepler-30

The Breakthrough Listen Search for Intelligent Life: MeerKAT Target Selection

The influence of surface CO2 condensation on the evolution of warm and cold rocky planets orbiting Sun-like stars

Planet-induced radio emission from the coronae of M dwarfs: the case of Prox Cen and AU Mic

March 30, 2021 updates

Life in the Cosmos: From Biosignatures to Technosignatures

Compact pebbles and the evolution of volatiles in the interstellar comet 2I/Borisov

Photonic materials for interstellar solar sailing

A new approach to spectroscopic phase curves: The emission spectrum of WASP-12b observed in quadrature with HST/WFC3

Stellar versus Galactic: The intensity of cosmic rays at the evolving Earth and young exoplanets around Sun-like stars

HST PanCET program: Non-detection of atmospheric escape in the warm Saturn-sized planet WASP-29 b

A transmission spectrum of the planet candidate WD 1856+534 b and a lower limit to its mass

The Curious Case of Argon

March 29, 2021 updates

Precise radial velocities of giant stars – XV. Mysterious nearly periodic radial velocity variations in the eccentric binary ε Cygni

Simulation and analysis of the coherent-dispersion spectrometer for exoplanet detection

The “Breakthrough” Proposal for Laser-accelerated Spacecraft is not Feasible

A joint mind consideration of the Drake equation in the search for extraterrestrial intelligence

Assessment of Isoprene as a Possible Biosignature Gas in Exoplanets with Anoxic Atmospheres

An exploration of model degeneracies with a unified phase curve retrieval analysis: The light and dark sides of WASP-43 b