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The Milky Way appears above Earth’s bright atmospheric glow in this Aug. 23, 2025, photograph from the International Space Station as it soared 261 miles above southern Iran at approximately 12:54 a.m. local time. The camera was configured for low light and long duration settings. -- NASA/ESA larger image

Astronomy & Telescopes, Biosignatures & Paleobiology, Imaging & Spectroscopy, Intelligence & Language, Interstellar, SETI & Technosignatures

Broadband SETI: A New Strategy To Find Nearby Alien Civilizations

by Keith CowingMarch 10, 2026March 10, 2026

false color NIRCam image of the Orion Bar11 showing the NIRSpec mosaic footprint

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

Aromatic Species In The Molecular Universe

by Keith CowingMarch 9, 2026March 9, 2026

The schematic diagram of the Space Radiobiological Exposure Facility. -- Nature Communications

Astrochemistry, Astrogeology, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Meteorites & Asteroids, Radiation

Space Ionizing Radiation Triggers The Formation Of Peptides And Organophosphates On Olivine Surfaces

by Keith CowingMarch 8, 2026March 8, 2026

An artist's impression of 3I/ATLAS is shown as it passes near the Sun, illuminating one side of the comet. On the side of the comet closer to the sun, the methanol gas is shown in blue, with icy dust grains still present in the gas. On the dark side of the comet, the hydrogen cyanide is shown in orange. Credit: NSF/AUI/NSF NRAO/M.Weiss

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Interstellar

ALMA Detects Extremely Abundant Alcohol in Interstellar Comet 3I/ATLAS

by Keith CowingMarch 6, 2026March 6, 2026

Reflecting disc of radius R at distance r from a body of mass M and luminosity L. -- astro-ph.SR

Biosignatures & Paleobiology, Intelligence & Language, Interstellar, SETI & Technosignatures

Stellar Engines And Dyson Bubbles Can Be Stable

by Keith CowingMarch 4, 2026March 4, 2026

Reconstructed distribution of radio sources on Earth with noise (SNR of 5)

Astronomy & Telescopes, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Intelligence & Language, Interstellar, SETI & Technosignatures

Rotational Doppler Cartography Of Technosignatures On Unresolved Planets

by Keith CowingMarch 3, 2026March 3, 2026

A.1. Location of CO2 ice in NGC 6302. The image shows HST/WFC3 observations featuring filter F656N (Kastner et al. 2022), which traces Hα emission. The JWST MIRI mosaic is indicated by the white frame. Contours show the column density of gas-phase CO2, with corresponding log N values (cm−2 ) provided in the lower left. The yellow dot marks the pixel position (R.A. = 17h :13m :44.402s , Dec. = - 37◦ :06′ :10.23 (J2000))used to extract the spectra shown in the Figs. 1, 2, B.1, C.1. - astro-ph.GA

Astrochemistry, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Interstellar

Detection Of CO2 Ice In The Planetary Nebula NGC 6302

by Keith CowingFebruary 28, 2026February 28, 2026

This image shows the location of the Central Molecular Zone (CMZ), a region at the core of our galaxy rich in dense and intricate gas clouds. This zone has been mapped with the Atacama Large Millimeter/submillimeter Array (ALMA), as part of the ALMA CMZ Exploration Survey or ACES. The inset is an ACES image where different molecules are displayed in different colours. The entire image – the largest ever made with ALMA – is as long as three full Moons side-by-side in the sky. Credit: ALMA(ESO/NAOJ/NRAO)/S. Longmore et al. Stars in inset: ESO/D. Minniti et al. Milky Way: ESO/S. Guisard Larger image

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

Astrochemistry In The Central Molecular Zone Of The Milky Way

by Keith CowingFebruary 26, 2026February 26, 2026

One hour stacked HATPI subtracted images of 3I/ATLAS from each of the nights on which 3I/ATLAS is formally detected with 3σ confidenc

Astrochemistry, Astronomy & Telescopes, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Comets and Asteroids, Icy Worlds, Imaging & Spectroscopy, Interstellar

HATPI Pre-Perihelion Time-series Photometry of the Interstellar Comet 3I/ATLAS

by Keith CowingFebruary 26, 2026February 26, 2026

Simulation results of abundance ratios [H2O2]/[H2O] (black lines), [H2]/[H2O] (orange lines), and [O2]/[H2O] (blue lines) with our model (model A) at 16 K (solid lines) and 77 K (dashed lines). The gray shaded and line filled regions show the experimental results of [H2O2]/[H2O] by Gomis et al. (2004a) at 16 and 77 K, respectively, with an assumed uncertainty of a factor of 3. -- astro-ph.GA

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Simulation Of Proton Radiolysis Of H2O And O2 Ices With The Nautilus Code

by Keith CowingFebruary 25, 2026February 25, 2026