We present radial velocity follow-up obtained with ESPRESSO of the M-type star LTT 1445A (TOI-455), for which a transiting planet b with an orbital period of~5.4 days was detected by […]
extrasolar
Posted inAstrochemistry, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Broccoli Gas (methyl bromide): A Better Way To Find Life In Space
Broccoli, along with many other plants and microorganisms, emit gases to help them expel toxins. Scientists believe these gases could provide compelling evidence of life on other planets.
Posted inBiogeochemical Cycles & Geobiology, Press Release, Water/Hycean Worlds & Oceanography
A Note on the “Various Atmospheres over Water Oceans on Terrestrial Planets with a One-Dimensional Radiative-Convective Equilibrium Model
It has been investigated the possibility of the various atmospheres over water oceans. We have considered the H2 atmosphere and He atmosphere concerning to N2 atmosphere over oceans.
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release
Climate Of High Obliquity Exo-terrestrial Planets With A Three-dimensional Cloud System Resolving Climate Model
Planetary climates are strongly affected by planetary orbital parameters such as obliquity, eccentricity, and precession.
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Press Release
Oxygen Controls On Magmatism In Rocky Exoplanets
Refractory oxygen bound to cations is a key component of the interior of rocky exoplanets. Its abundance controls planetary properties including metallic core fraction, core composition, and mantle and crust […]
Posted inBiosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release
Simulating Reflected Light Coronagraphy Of Earth-like Exoplanets With Large IR/O/UV Space Telescope: Impact And Calibration Of Smooth Exozodiacal Dust
Observing Earth-like exoplanets orbiting within the habitable zone of Sun-like stars and studying their atmospheres in reflected starlight requires contrasts of ∼1e−10 in the visible.
Posted inAtmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Press Release
A Catalog Of Habitable Zone Exoplanets
The search for habitable planets has revealed many planets that can vary greatly from an Earth analog environment.
Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Press Release, Water/Hycean Worlds & Oceanography
NASA ROSES-22 Amendment 54: C.22 Concepts for Ocean Worlds Life Detection Technology Not Solicited This Year
The goal of Concepts for Ocean worlds Life Detection Technology (COLDTech) is to support the development of spacecraft-based technology for surface and subsurface exploration of ocean worlds such as Europa […]
Posted inExoplanets, -moons, -comets, Habitable Zones, Press Release
Survival of Terrestrial N2-O2 Atmospheres in Violent XUV Environments Through Efficient Atomic Line Radiative Cooling
Atmospheres play a crucial role in planetary habitability. Around M dwarfs and young Sun-like stars, planets receiving the same insolation as the present-day Earth are exposed to intense stellar X-rays […]
Posted inBiogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Imaging & Spectroscopy, Press Release, TRAPPIST-1
Evaluating The Plausible Range Of N2O Biosignatures On Exo-Earths: An Integrated Biogeochemical, Photochemical, And Spectral Modeling Approach
Nitrous oxide (N2O) — a product of microbial nitrogen metabolism — is a compelling exoplanet biosignature gas with distinctive spectral features in the near- and mid-infrared, and only minor abiotic […]