Sun-like star Archives

Upper: Transit depths of V1298 Tau e as a function of wavelength, reduced with Eureka!. The blue and red curves show the best-fit transmission spectra from our free re- trieval with and without CS2, respectively. Including CS2 yields a decisive improvement in the Bayesian evidence (∆ ln Z = 33.2), corresponding to an 8.4σpreference. Lower: Absorption cross sections of the nine dominant molecular species included in our free retrieval and forward model. While a wider range of additional species were explored using POSEIDON opacity database, CS2 uniquely reproduces both the∼4.6–4.7 µm feature and the sharpened peak near ∼4.3 µm that cannot be explained by CO2 or CO alone. -- astro-ph.EP

Photochemical CS2 Gas Detected On A 20-Myr-old Exoplanet

by Keith CowingJune 3, 2026June 3, 2026

Probing the atmospheres of young exoplanets offers a powerful window into how planetary systems evolve and the physical and chemical processes that drive those early evolutions.

A demonstration of the limitations of the PSPT data processing pipeline, which did not process the limb uniformly with the rest of the Solar disc. The solid blue line is the stated extent of the solar disk in the original dataset, and the dashed red line is the extent to which the data has been cleaned. Note between the red and blue lines there exists a slight intensity increase — an example of the difference between the processed and unprocessed data separated by this boundary. -- astro-ph.SR

Astronomy & Telescopes, Imaging & Spectroscopy, Space Weather & Heliophysics, Status Report, Stellar Cartography

Astrometric Exoplanet Detection Survives Solar-like Stellar Contamination

by Keith CowingMay 23, 2026May 23, 2026

Astrometric monitoring of stars provides a promising method for discovery of low-mass planets around nearby Sun-like stars.

Hertzsprung-Russell diagram of the stellar catalogue. The Sun is shown as a reference and the letters stand for the spectral type. The grey lines represent evolutionary tracks of the Spelaion grid selected by fixing the initial chemical composition to X0 = 0.72 and Z0 = 0.018, and setting αov = 0. - astro-ph.SR

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release, Space Weather & Heliophysics, Stellar Cartography

Asteroseismic Modelling Of Main-sequence Solar-like Stars And Kepler Exoplanet Host Stars With The FICO Procedure I. Catalogue Of Fundamental Stellar Properties

by Keith CowingMay 1, 2026May 1, 2026

We present detailed asteroseismic modelling of 95 main-sequence solar-like stars and Kepler exoplanet host stars using the FICO procedure, a three-step method that combines forward and inverse techniques that enables […]

Injection–recovery maps over each of our six injection–recovery target bins that span different TESS magnitudes (columns) and nonrotating (top row) and rotating targets (bottom row) showing our pipeline’s sensitivity to transiting planet signals across period–Rp/R⋆ space. Each cell in this recursive structure contains at least 50 injected planets, with the black grid denoting the boundaries of each cell. -- The Astronomical Journal

Astronomy & Telescopes, Exoplanets, -moons, -comets, Press Release, Stellar Cartography

The Most Common Planets In The Galaxy Don’t Appear Around The Most Common Stars

by Keith CowingApril 30, 2026April 30, 2026

Astronomers now estimate there is at least one planet for every star in our galaxy. These worlds, called exoplanets, are planets that orbit stars outside our solar system. But new […]

The picture was taken from the top of the LSS after the chamber was reopened. It gives us a direct view of Plato’s 26 ultrasensitive cameras. These are the special eyes that the mission will use to monitor more than 150 000 bright stars at the same time, hunting for terrestrial planets orbiting Sun-like stars. -- ESA Larger image

Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, PLATO, Press Release

Astrobiology Mission Update: Plato Habitable Exoplanet Hunter Integration

by Keith CowingApril 27, 2026April 27, 2026

The European Space Agency Plato mission has successfully completed a series of tough tests under space‑like conditions. With this accomplishment, the spacecraft is on track to lift off in early […]

An artist's rendition of pair of twin stars being born in the HOPS-312 system in Orion. Credit: NSF/AUI/NSF NRAO/B. Saxton

Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Interstellar, Press Release, Stellar Cartography

Most Close Pairs of Stars Are Born as Cosmic Twins

by Keith CowingApril 25, 2026April 25, 2026

A new study of infant stars in the Perseus and Orion star-forming regions suggests that most close pairs of stars are born as twins in the same disk, rather than […]

Positions of candidate planets of HD 161098 b and HD 161098 c relative to the HZ of the star. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report

The RoPES Project With HARPS and HARPS-N III. Two Candidate Planets Orbiting The G-type Star HD 161098

by Keith CowingApril 20, 2026April 20, 2026

Context. The development of refined instruments and techniques for a detailed analysis of the radial velocities (RVs) of stars other than the Sun allows the presence of planetary signals of […]

This is an artist's impression of a unique type of exoplanet discovered with the Hubble Space Telescope. The planet is so close it to its star that it completes an orbit in 10.5 hours. The planet is only 750,000 miles from the star, or 1/130th the distance between Earth and the Sun. Credit: NASA, ESA, and A. Schaller (for STScI) - https://science.nasa.gov/asset/hubble/artists-impression-of-an-ultra-short-period-planet/ - This file is licensed under the Creative Commons Attribution 4.0 International license.

AI - Data - Apps - Cybernetics, Astronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release

AI Approach Uncovers Dozens Of Hidden Planets In NASA’s TESS Data

by Keith CowingMarch 31, 2026March 31, 2026

Astronomers at the University of Warwick have validated over 100 exoplanets, including 31 newly detected planets, using a new artificial intelligence tool applied to data from NASA’s Transiting Exoplanet Survey […]

Strength of key long-term feedbacks governing Earth’s climate system (D. S. Abbot 2016; D. D. B. Koll & T. W. Cronin 2018; C. W. Arnscheidt & D. H. Rothman 2020; P. Forster et al. 2021). Each bar represents the feedback parameter in W m−2 K−1, estimated from Earth system model assessments and paleoclimate constraints. The upper axis shows the approximate feedback strength associated with a 50 K climate perturbation, representative of transitions between major states (e.g., snowball to temperate). Feedbacks are sorted by magnitude. Negative values (blue) represent stabilizing feedback that dampens temperature changes, while positive values (orange) indicate destabilizing feedback that amplifies them. Outgoing longwave radiation and the carbonate–silicate cycle are among the strongest stabilizing processes, while the ice–albedo feedback exerts a strong destabilizing influence. Models incorporating the three dominant types of feedback explain the general behavior of Earth’s long-term mean climate. -- The Planetary Science Journal

Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Status Report

Not Earth-like Yet Temperate? More Generic Climate Feedback Configurations Still Allow Temperate Climates in Habitable Zone Exo-Earth Candidates

by Keith CowingMarch 20, 2026March 20, 2026

Earth’s climate is influenced by over a dozen types of feedback, but only three dominate its long-term climate behavior. Models of the exoplanet habitable zone (HZ) assume that this is […]

Overview of the L1544 (LEFT panel) and IRAS 16293–2422 (RIGHT panel) regions as traced by the Herschel3 continuum maps at 350 𝜇m. The white contours correspond to [5,7,9,12,14]𝜎, where 𝜎 is 12 MJy sr−1 in L1544, and 1.1 MJy sr−1 in IRAS 16293–2422, respectively. The FoVs of the GBT observations are shown as blue circles – solid line for Ku-band and dashed line for X-band observations (see Sect. 3). Green diamonds identify the continuum (∼1.3 mm) peak position in L1544 (Ward-Thompson et al. 1999) and the position of the A/B, and E objects in IRAS 16293–2422 (Kahle et al. 2023). The size of the Herschel beam (25′′) is shown in the bottom left corner, while the scale bar is shown in the bottom right. -- astro-ph.GA

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report

Carbon Chain Diversity In L1544 And IRAS 16293-2422: An Astrochemical Pathfinder Study For The SKAO

by Keith CowingFebruary 19, 2026February 19, 2026

Astrochemical observations have revealed a surprisingly high level of chemical complexity, including long carbon chains, in the earliest stages of Sun-like star formation.

Sun-like star

Photochemical CS2 Gas Detected On A 20-Myr-old Exoplanet

Astrometric Exoplanet Detection Survives Solar-like Stellar Contamination

Asteroseismic Modelling Of Main-sequence Solar-like Stars And Kepler Exoplanet Host Stars With The FICO Procedure I. Catalogue Of Fundamental Stellar Properties

The Most Common Planets In The Galaxy Don’t Appear Around The Most Common Stars

Astrobiology Mission Update: Plato Habitable Exoplanet Hunter Integration

Most Close Pairs of Stars Are Born as Cosmic Twins

The RoPES Project With HARPS and HARPS-N III. Two Candidate Planets Orbiting The G-type Star HD 161098

AI Approach Uncovers Dozens Of Hidden Planets In NASA’s TESS Data

Not Earth-like Yet Temperate? More Generic Climate Feedback Configurations Still Allow Temperate Climates in Habitable Zone Exo-Earth Candidates

Carbon Chain Diversity In L1544 And IRAS 16293-2422: An Astrochemical Pathfinder Study For The SKAO

Astrobiologist Dale Andersen’s Antarctic Field Report: 14 November 2026: Setting Up Lab and Dive Tents

Testing The Hypothesis, ‘Planetary Protection Is Expensive’ From The ESA Perspective

Tracing Galactic Dust Reddening with Polycyclic Aromatic Hydrocarbon Emission: SPHEREx Observations of the North Ecliptic Pole

Signatures of CH4 and NH3 in the Atmosphere of β Pictoris b

Hydrolyzed Hazes on Water-rich Exoplanets: Composition and Prebiotic Chemistry