A new catalog containing 717 head–tail radio sources — those in which the radio lobes are bent by interactions with the intracluster medium — shows that these objects can have a variety of morphologies.

Interactions between planetesimals in circumstellar disks might solve the mystery of why the dust content in these disks tends to increase between 1 and 2 million years after formation and then decline.

Using computational tools to model the propagation of muons from Earth’s surface to underground facilities, researchers are able to match the measured underground muon fluxes.

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.