A team of astronomers led by Elisabeth Matthews at the Max Planck Institute for Astronomy (MPIA) has made a discovery that highlights the limits of most current models of exoplanet […]
Earth-analog
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Radiation, Status Report
Topography-Induced Stationary Waves And The Onset Of Nightside Warming On Rocky Planets Around M-dwarf Stars
Among potentially habitable worlds, rocky planets orbiting M dwarfs offer the most favorable prospects for atmospheric characterization, yet their climates may differ substantially from those of Earth analogs.
Posted inAnalog Studies, Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Status Report
Maximizing The Sensitivity Of ELT To Habitable Worlds With A Space-based Starshade
The ELT will provide groundbreaking science across a wide range of areas, including small habitable-zone exoplanets; however, true Earth analogs in the habitable zones of Sun-like stars are generally beyond […]
Posted inAstrobiology (general), Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Courses, Habitable Zones, Nomenclature, Systematics, Natural History, Planetary Protection & Biosafety, Science Fiction, SETI & Technosignatures, Status Report
A Terminology And Quantitative Framework For Assessing The Habitability Of Solar System And Extraterrestrial Worlds
The search for extraterrestrial life in the solar system and beyond is a key science driver in astrobiology, planetary science, and astrophysics.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Status Report, Water/Hycean Worlds & Oceanography
An Earth-like Density For The Temperate Earth-sized Planet GJ 12b
While JWST has provided us with the opportunity to probe the atmospheres of potentially-habitable planets, observations of the TRAPPIST-1 system have shown us that active stars severely complicate efforts at […]
Posted inAnalog Studies, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Status Report, Water/Hycean Worlds & Oceanography
Multivariate Statistical Analysis of Exoplanet Habitability: Detection Bias and Earth Analog Identification
We present a comprehensive multivariate statistical analysis of 517 exoplanets from the NASA Exoplanet Archive to identify potentially habitable worlds and quantify detection bias in current surveys.
![Fiducial model generated (synthetic) reflected light spectrum of an Earth-like planet at quadrature (i.e., at a planetary phase angle α = 90°; see Table 1 for fiducial input values). The colored areas indicate the spectral impact of the gas species by showing the difference between the baseline spectrum (black line) and the spectrum obtained if they were absent from the atmosphere. The top of the figure shows the two wavelength ranges considered and their spectral resolving power: red bandpass (λ = [0.87, 1.05] µm, res = 140; see Appendix B) and visible (λ = [0.45, 1] µm, res = 140) + NIR (λ = [1, 1.80] µm, res = 70). The error bars show the nonrandomized, wavelength-independent noise corresponding to specific signal-to-noise ratios (SNR) at the reference wavelengths λ = 0.45 µm for the vNIR range, and λ = 0.88 µm for the red bandpass. --astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/06/Influence-of-Orbit-and-Mass.png?resize=1200%2C720&ssl=1)
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Influence of Orbit and Mass Constraints on Reflected Light Characterization of Directly Imaged Rocky Exoplanets
Survey strategies for upcoming exoplanet direct imaging missions have considered varying assumptions of prior knowledge. Precursor radial velocity surveys could have detected nearby exo-Earths and provided prior orbit and mass […]