The presence of asymmetries and substructures in protoplanetary disks, revealed by both dust and gas emission, highlights the potential interplay and the broader connection between chemistry and dynamics in disk […]
astro-ph.EP]
Posted inAstrogeology, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Europa, Habitable Zones, Icy Worlds, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Status Report
Spectral Decomposition Reveals Surface Processes on Europa
Competing processes shape Europa’s surface: geological activity replenishes material through resurfacing, while bombardment by charged particles alters surface chemical composition. Each process leaves distinct spectral signatures.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report
On The Dual Nature Of Atmospheric Escape
Planetary atmospheres cannot remain hydrostatic at all altitudes because they approach finite density at infinite radius, implying infinite mass. Classical treatments address this in two directions: either retain a hydrostatic […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Habitable Zones, Mars, Status Report
Atmospheric Escape Rates from Mars – If it Orbited an Old M-Dwarf Star
Atmospheric escape is an important process that influences the evolution of planetary atmospheres. A variety of physical mechanisms can contribute to escape from an atmosphere, including thermal escape, ion escape, […]
Posted inBiosignatures & Paleobiology, Dione, Enceladus, Icy Worlds, Mapping, Geodesy, Cartography, Bathymetry, Mimas, Missions & Hardware, Press Release, Rhea, Saturn, Tethys, Water/Hycean Worlds & Oceanography
Low-Energy and Low-Thrust Exploration Tour of Saturnian Moons with Full Lunar Surface Coverage
This study presents the trajectory design for a mission touring Saturn’s Inner Large Moons (Rhea, Dione, Tethys, Enceladus, and Mimas) engineered to meet observational requirements, including full surface coverage, while […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Gaia Mission, Habitable Zones, Imaging & Spectroscopy, Status Report
Predicting Gaia Astrometry’s Ability To Constrain The Populations Of Circumbinary Planets
The coming data releases of Gaia are expected to result in an upheaval of exoplanet science, in particular for long period giant planets (0.2MJ≤M≤25MJ). One class of exoplanets which Gaia […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Status Report, Stellar Cartography
TEPCat: The Transiting Extrasolar Planet Catalogue
Transiting extrasolar planets are extraordinarily valuable for understanding the characteristics and formation of planets, because they are the only exoplanets whose physical and orbital properties can be measured to high […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Status Report
Not Earth-like Yet Temperate? More Generic Climate Feedback Configurations Still Allow Temperate Climates in Habitable Zone Exo-Earth Candidates
Earth’s climate is influenced by over a dozen feedbacks, but only three dominate its long-term climate behavior. Models of the exoplanet habitable zone (HZ) assume that this is similar for […]
Posted inAstrogeology, Exoplanets, -moons, -comets, Status Report
Fundamentals Of Interior Modelling And Challenges In The Interpretation Of Observed Rocky Exoplanets
Most our knowledge about rocky exoplanets is based on their measure of mass and radius. These two parameters are routinely measured and are used to categorise different populations of observed […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
Two Temperate Earth- and Neptune-sized Planets Orbiting Fully Convective M dwarfs
As the diversity of exoplanets continues to grow, it is important to revisit assumptions about habitability and classical HZ definitions. In this work, we introduce an expanded ‘temperate’ zone, defined […]