S. R. Callos et al 2025 Planet. Sci. J. 6 17
Particle clouds called spokes in the outer parts of Saturn’s rings show a variety of intriguing behaviors, including seasonal variations and switching from appearing darker and lighter than the ring material.
Twenty years of observations show a consistently hot temperature for the plasma surrounding HL Tau, similar to what is seen for other protostars in the same evolutionary stage.
Simulations show that high-speed plasma jets can arise in the the magnetosphere of Mercury, though they are smaller and less common on Mercury than they are on Earth.
New simulations of stars roaming the disk of an active galactic nucleus suggest that stars with masses around 100 times the mass of the Sun accrete at a lower rate than previously thought.
New modeling of the F10.7 index — a measure of the Sun’s flux at a wavelength of 10.7 centimeters, which is correlated with its extreme-ultraviolet flux — outperforms existing models, aiding in space weather forecasting.
Researchers report the first measurement of the deuterium-to-hydrogen ratio in a substellar object outside the solar system; this measurement suggests a mass of less than 12 Jupiter masses for the object.