Recent claims of biosignature gases in sub-Neptune atmospheres have renewed interest in water-rich sub-Neptunes with surface oceans, often referred to as Hycean planets.
Around our Sun, terrestrial planets did not grow beyond Earth in mass, while super-Earths are found to orbit approximately every other solar-like star.
6000+ exoplanets are now detected using various techniques, with estimates of billions of planets existing in our Galaxy alone.
![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)
We present updated non-adiabatic and inhomogeneous evolution models for Uranus and Neptune, employing an interior composition of methane, ammonia, water, and rocks.
Using state-of-the-art ab initio interaction-induced dipole and potential-energy surfaces for hydrogen-helium (H2-He) pairs, we compute the rototranslational collision-induced absorption coefficient at 40-400 K for frequencies covering 0-4000 cm-1.
The discovery of many exoplanets has revealed an incredible diversity of orbital architectures.
We present statistical results from the Epoch of Giant Planet Migration RV planet search program.
Scientists using NASA’s Hubble Space Telescope went looking for evidence of one phenomenon and found quite another. The research team studied the four largest moons of the ice giant Uranus, […]
Of the few thousand discovered exoplanets, a significant number orbit in the habitable zone of their star.
This review article delves into the study of low-mass exoplanets: super-Earths, mini-Neptunes and the new categories within and between that we are starting to discover.
