habsignature Archives

Schematic showing some of the major chemical cycles involved in ozone (O3) formation in Venus’s atmosphere. The major H, S and Cl bearing species are outgassed from Venus’s surface. These species are subsequently dissociated by photochemistry, and the products are involved in chemical cycles that produce O2 and O. The resulting O2 and O react to produce O3. We include the unknown chemical pathway producing O3 required by our results. -- astro-ph.EP

Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Imaging & Spectroscopy, Status Report, Venus

Abiotic Ozone In The Observable Atmospheres Of Venus And Venus-like Exoplanets

by Keith CowingMay 23, 2025May 23, 2025

Ozone is a potential biosignature and disambuguator between Earth-like and Venus-like exoplanets due to its association on Earth with photosynthetically produced oxygen (O2).

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Abiotic Ozone In The Observable Atmospheres Of Venus And Venus-like Exoplanets

Training For Astrobiology Spelunking On Mars

Mars Perseverance Rover’s Panoramic View of Broom Point

Planets Orbiting Barnard’s Star Seem To Be Small, Strange, And Utterly Uninhabitable

Experimental Astrochemistry And Machine Learning Unravel The Formation Of Oxygen-bearing Organic Molecules In Extraterrestrial Ices

Bacteria Form Herds To Survive Predators, Offering Fresh Insight Into Earth’s Carbon Cycle