The thermodynamic dissipation theory for the origin of life asserts a thermodynamic imperative for the origin of life, suggesting that the fundamental molecules of life originated as self-organized molecular photon […]
![Results of the pRT retrievals for the atmosphere of HD 86226 c. Left: PACMAN spectrum (black data) and 1, 2, and 3σ percentiles of the spectra from the posteriors of the pRT retrieval with scaled solar chemistry (green shadings). The gray spectra show cloud-free models with 1× and 1000× solar metallicity. Right: Posterior distribution for the two retrieval runs with scaled solar chemistry (green) and H-He-H2O atmosphere (purple). The pressures are provided in units of log10([bar]). Contours are drawn at the 1, 2, and 3σ levels. Vertical dashed lines mark the 16%, 50%, and 84% quantiles. astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/07/The-SPACE-Program-I.png?resize=1200%2C709&ssl=1)
Sub-Neptune exoplanets are the most abundant type of planet known today. As they do not have a Solar System counterpart, many open questions exist about their composition and formation.
Kepler-221 is a G-type star hosting four planets. In this system, planets b, c, and e are in (or near) a 6:3:1 three-body resonance even though the planets’ period ratios […]
‘‘Are we alone in the Universe?’’ For thousands of years, this question was confined to philosophy, and it is only very recently that modern science has begun to provide solid […]
![Kepler-315 b flux, orbital period, and transit flux. The prominent flux drop while observing the star Kepler-315 shows the close orbit of Kepler-315 b. (A) Normalized brightness (flux) of the star Kepler-315 over its whole observed time period. (B) Orbital period of the planet using the BLS method. The BLS power (transit signal, unitless periodogram object), of folded light curve is plotted over a period of days [d]. (C) The Transit Flux (Flux versus Phase) reveals the minimum flux value of planet Kepler-315 b, which helped us calculate its planetary properties and habitability. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/01/Studyinghabitabilityof.png?resize=1200%2C718&ssl=1)
Astronomers have always wanted to know whether there are other planets around other stars that support life like our Earth. The search for life elsewhere has led us to new […]
