The ice shell on Saturn’s moon Enceladus appears to be thicker at the equator that at the poles, which simulations suggest is due to a non-equilibrium state or tidal dissipation.
The existence of runaway-greenhouse planets may create a discontinuity in radius–density space, and the PLAnetary Transits and Oscillation of stars (PLATO) mission has the potential to detect this discontinuity.
Several purported high-redshift active galactic nuclei identified in JWST images have been revealed via spectroscopy to instead be brown dwarfs, including the most distant brown dwarf yet discovered.
Brown dwarf WISE J085510.83−071442.5 has an effective temperature of just 285K — that’s a comfortable springtime temperature of 53℉ (12℃) — and a seemingly cloudless atmosphere.
Researchers identify one particularly promising candidate event that may be the disruption of a white dwarf by a black hole with a mass less than 100,000 solar masses — an elusive intermediate-mass black hole.
The Interstellar Boundary Explorer (IBEX) team presents the three most recent years of data, explores long-term variations, and provides maps that separate the “ribbon” feature from the global flux of neutral atoms.