The Outer Planets Assessment Group (OPAG) will hold a Town Hall at the AGU meeting in New Orleans, LA. Please join us for a community discussion! The steering committee will […]
Uranus
Posted inAstrogeology, Atmospheres, Climate, Weather, Ice Giant, Magnetic Fields, Electromagnetism, bioelectricity,, Neptune, Press Release, Uranus
Uranus And Neptune Might Be Rock Giants
The planets in the Solar System are typically divided into three categories based on their composition: the four terrestrial rocky planets (Mercury, Venus, Earth and Mars), followed by the two […]
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Ice Giant, Missions & Hardware, Neptune, Status Report, Uranus
Ice Giants Pre-Decadal Survey Mission Study Report
The Ice Giants Study was commissioned by NASA to take a fresh look (as of 2017) at science priorities and concepts for missions to the Uranus and Neptune systems in […]
![Reprocessed images of Uranus [L]] and Neptune [R] NASA/JPL-Caltech (Uranus and Neptune); “Modelling the Seasonal Cycle of Uranus’s Colour and Magnitude, and Comparison with Neptune,” by Patrick G. J. Irwin et al., in Monthly Notices of the Royal Astronomical Society, Vol. 527, No. 4; February 2024 (reprocessed images)](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/06/Different-Inhomogeneous-Evolutionary.png?resize=1200%2C721&ssl=1)
Posted inAstrogeology, Exoplanets, -moons, -comets, Ice Giant, Icy Worlds, Neptune, Status Report, Uranus
Icy or Rocky? Convective Or Stable? New Interior Models Of Uranus and Neptune
We present a new framework for constructing agnostic and yet physical models for planetary interiors and apply it to Uranus and Neptune.
Posted inAriel, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Icy Worlds, Imaging & Spectroscopy, Mapping, Geodesy, Cartography, Bathymetry, Miranda, Press Release, Uranus, Water/Hycean Worlds & Oceanography
Evidence Of A Past, Deep Ocean On Ariel, A Uranian Moon
Growing evidence suggests that a subsurface ocean lurks beneath the icy surface of Uranus’ moon Ariel, but new research, published in Icarus, characterizes the possible evolution of this ocean, and […]
Posted inAstronomy & Telescopes, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release, Proxima Centauri, Saturn, tau Ceti, Uranus
On the Detection Of Exorings in Reflected Light With JWST NIRCam
When directly imaging a cold giant exoplanet hosting a ring system, the reflected light from the rings can outshine the planet’s thermal emission and reflected-light in the near-infrared.
Posted inAriel, Ice Giant, Icy Worlds, Miranda, Missions & Hardware, Oberon, Press Release, Titania, Umbriel, Uranus
The Uranus Flagship: Investigating New Paradigms for Outer Solar System Exploration Workshop Summary Report
This white paper is a summary of the Uranus Flagship Workshop that took place 21 to 23 May 2024 at NASA’s Goddard Space Flight Center. Co-led by Goddard and Johns […]
Posted inExoplanets, -moons, -comets, Ice Giant, Icy Worlds, Neptune, Status Report, Uranus
Ab Initio Entropy Calculations of Water Predict the Interiors of Uranus and Neptune to be 15-30% Colder than Previous Models
Ab initio free energy calculations are employed to derive the entropy of liquid and superionic water over a wide range of conditions in the interiors of Uranus and Neptune. The […]
Posted inAriel Mission, Astrochemistry, Astrogeology, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Ice Giant, Icy Worlds, Neptune, Status Report, Uranus
The Possibility of Hydrogen-Water Demixing in Uranus, Neptune, K2-18b and TOI-270d
The internal structures of Uranus and Neptune remain unknown. In addition, sub-Neptunes are now thought to be the most common type of exoplanets.
Posted inAstrogeology, Atmospheres, Climate, Weather, Ice Giant, Icy Worlds, Imaging & Spectroscopy, Neptune, Status Report, Uranus
Different Inhomogeneous Evolutionary Histories for Uranus and Neptune
We present updated non-adiabatic and inhomogeneous evolution models for Uranus and Neptune, employing an interior composition of methane, ammonia, water, and rocks.