![Predictions of our multi-zone chemical evolution model presented in Section 2.1 as a function of the evolutionary time t and the Galactocentric distance. Left Panel: evolution of the total (CC+Type Ia) SN rates. The red and green dashed horizontal lines indicate (case 1) and 2× (case 2) values, respectively, representing the minimum SN rate thresholds tested for SN explosion-induced destruction effects in this study. Right Panel: Predicted age-metallicity relation. The redshaded region marks [Fe/H] < -1 dex where, as suggested by Johnson & Li (2012), conditions are considered unfavourable for the formation of terrestrial planets. -- astro-ph.SR](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/06/Shaping-Galactic-Habitability.png?resize=1200%2C719&ssl=1)
In exoplanet research, the focus is increasingly on identifying Earth analogs, planets similar in density and habitability potential.
Galactic Habitable Zone
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Interstellar, Status Report
Rethinking Habitability using Biogenic Precursors: Formaldehyde in Millimeter Molecular Clouds of the Inner Galaxy
We present a comprehensive study of formaldehyde (H2CO) absorption and radio recombination line (H110a) emission in 215 molecular clouds from the Bolocam Galactic Plane Survey (BGPS), observed using the Nanshan […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Interstellar, Status Report, Water/Hycean Worlds & Oceanography
Eta-Earth Revisited II: Deriving a Maximum Number of Earth-like Habitats in the Galactic Disk
In Lammer et al. 2024, we defined Earth-like Habitats (EH) as rocky planets in the habitable zone of complex life (HZCL) on which Earth-like N2-O2-dominated atmospheres with minor amounts of […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Status Report, Stellar Cartography
Solar System Migration Points to a Renewed Concept: Galactic Habitable Orbits
Astrophysical evidence suggests that the Sun was born near 5 kpc from the Galactic center, within the corotation radius of the Galactic bar, around 6-7 kpc.
Posted inAI - Data - Apps - Cybernetics, Astronomy & Telescopes, Habitable Zones, Status Report
Dynamical Aspects Of Galactic Habitability In N-body Simulations
Recent studies of Galactic evolution revealed that the dynamics of the stellar component might be one of the key factors when considering galactic habitability.