[Royal Astronomical Society] UK astronomers are a step closer to playing a leading role in NASA’s search for alien life in the coming decades, after receiving £3million to continue developing […]
Astronomy & Telescopes
Posted inSETI & Technosignatures
Could Alien Signals Be Hiding On A Different Radio Channel?
[RAS] Astronomers searching for signs of extraterrestrial intelligence may have been missing alien signals in part of the radio spectrum that has not recently been explored.
Posted inExoplanets, -moons, -comets
Planetesimal Formation Across the Stellar Mass Spectrum and its Influence on Exoplanet-Inherited Volatile Budgets
[astro-ph.EP] Protoplanetary discs emerging from collapsing molecular clouds are capable of forming planetesimals at the water snowline during both the cloud collapse and Class II disc phases; such a scenario […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy
Achieving Efficient Broadband Spatial Filtering For LIFE: Status And Plan
[astro-ph.IM] Nulling interferometry is one of the most promising techniques that is envisioned for the imaging and characterization of exoplanets in the mid-infrared for ground-based and space-based observatories. On the […]
Posted inComets and Asteroids
A Comprehensive Study Of Comet 67P/Churyumov-Gerasimenko In The 2021/2022 Apparition. II. Colorimetry, Polarimetry, Modeling
[astro-ph.EP] This paper presents the second part of our multi-technique observational study of comet 67P during its 2021-2022 apparition. While the first paper focused on photometry and spectroscopy, here we […]
Posted inExoplanets, -moons, -comets
Dynamically Selected Mass-Radius Relationship For Low Mass Exoplanets
[astro-ph.EP] We study the mass-radius relationship of planets in multiplanet systems as a function of their dynamical architecture.
![Assuming the presence of two companions, the orbital evolution of the HD 216595 system for 500 years from the best-fit orbit: (a) orbits of the system, (b) the evolution of the semi-major axes, and (c) the evolution of the eccentricities. Blue color indicates the inner companion and black color is the outer companion. -- [astro-ph.SR]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/A-Search-for.png?resize=1200%2C652&ssl=1)
Posted inExoplanets, -moons, -comets
A Search For Exoplanets Around Northern Circumpolar Stars X. The Origin Of Radial Velocity Variations In The Evolved Star HD 216595
[astro-ph.SR] Detecting planetary companions around evolved stars, particularly asymptotic giant branch (AGB) stars, is challenging due to intrinsic stellar variability such as surface convection, pulsations, and mass loss, which can […]
![Simulated light curve for a periodic laser beacon at fpulse = 413 Hz at d = 15 pc observed with a Dtel = 1 m telescope at a cadence of 10 µs. The upper panels show a short segment of the noiseless pulse signal (left) and the corresponding signal including the estimated noise contributions (right). The bottom panel shows the integrated folded pulse profile after combining 108 pulses, resulting in an expected SNR of approximately 5.99. -- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/The-Interstellar-Laser.png?resize=1200%2C716&ssl=1)
Posted inSETI & Technosignatures
The Interstellar Laser Beacons Hypothesis and the Cosmic Lighthouses Project
[astro-ph.IM] In this paper, we argue that in a realistic, resource-limited scenario senders whose intent is to maximize successful communication at the lowest cost will utilize very long-lived, pulsed beacons.
![DFT-computed anharmonic absorption spectra of 1-cyanonaphthalene in its neutral (1-CNN0 , top panel), cation (1-CNN+ , middle panel), and anion (1-CNN− , bottom panel) charge states. The calculated vibrational transitions are convolved with a Lorentzian profile using a FWHM of 4 cm−1 to simulate realistic spectral profiles. Numerical labels near the major peaks represent their respective wavelengths. Key vibrational bands, including the CN stretch at ∼ 4.4–4.6 µm and the CH stretch at ∼ 3.2–3.3 µm, are explicitly highlighted.-- [astro-ph.GA]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Anharmonic-Infrared-Emission.png?resize=1200%2C718&ssl=1)
Posted inAstrochemistry
Anharmonic Infrared Emission Of Cyano-Substituted Polycyclic Aromatic Hydrocarbon Molecules: Cyanonaphthalenes As A Case Study
[astro-ph.GA] Recent detections of cyano-substituted polycyclic aromatic hydrocarbons (cyano-PAHs) highlight them as key tracers of nitrogen heterocycles in the interstellar medium (ISM).
Posted inExoplanets, -moons, -comets
New Exomoon Detection Challenges Cosmic Labels
[ESO] Observations made with the European Southern Observatory’s Very Large Telescope (ESO’s VLT) have revealed evidence for a moon-like object in the CD-35 2722 system. Unlike moons in our Solar […]