Updated ephemerides for hot Jupiter KELT-9 b resolve the tension between new observations and literature values, but the new results will be a challenge for general circulation models.
Tracking bright meteors is relatively simple, but tracking tiny, faint meteorites as they tumble to the ground is far harder, and deviations from a spherical shape make a big difference in our modeling.
Magnetic reconnection proceeds at a slower rate in 3D simulations than it does in 2.5D simulations, though the two rates converge when the reconnecting field is weak, which is relevant to heating by solar nanoflares.
A highly productive array of radio telescopes has captured the first sight of a circumplanetary disk around a star’s widely separated planetary-mass companion, giving insight into the formation of exomoons.
Simulations predict that just 0.06% of compact triple star systems result in Roche lobe overflow, with 64% of those cases ending in stable mass transfer rather than triple common envelope evolution.
A survey of 155 pre-main-sequence stars seeks to understand the connection between the properties of these systems and their propensity for accretion, which plays a role in the evolution of protoplanetary disks.