Astrobiology27- Page

Illustration of comparative biosignatures and habsignatures in an extrasolar system. Potential comparative biosignatures (green text) and habsignatures (blue text) as deviations from the abiotic baseline are annotated, with larger fonts

NASA-DARES RFI Findings Workshop — Grok via Astrobiology.com May 29–30, 2025 | Fairmont Hotel, Washington, D.C. – Georgetown The NASA Astrobiology Program invites you to participate in a two-day hybrid

RED Astrobiology Introductory Virtual School – Grok via Astrobiology.com RED is a Training School about the “Basics in Astrobiology”. Astrobiology addresses questions related to the origins of life, its evolution,

Phase folded and offset-subtracted ESPRESSO RVs with the modeled best-fit allesfitter RV curve for HD 35843 b (left) and HD 35843 c (right), with residuals plotted on the bottom. Stellar

Eos Molecular Cloud The Eos cloud, recently discovered in the far ultraviolet via H2 fluorescence, is one of the nearest known dark molecular clouds to the Sun, with a distance

Comparison of glucose (itself non-absorbing) at different time points after its addition to 85% w/w sulfuric acid. The glucose reacts with sulfuric acid and produces rose-pink solution with a single

Comparison of (telluric) molecular oxygen spectrum observed using low-medium resolution spectrograph and interferometer-based instruments. The top panel shows the observed telluric spectrum from archival X-Shooter spectra with spectral resolution ranging

Schematic depiction of an atmospheric temperature profile (dotted line) showing convective regions (blue) and radiative regions (orange). The profile illustrates a detached convective region in the middle atmosphere, separated from

Where Are They? — Grok via Astrobiology.com In this paper we consider the extent to which a lack of observations from SETI may be used to quantify the Fermi paradox.