The largest stellar spectroscopic survey of nearby galaxy M33 finds trends in stellar age and velocity that are dissimilar to those seen in the Milky Way and Andromeda galaxies.

Thanks to new observations from multiple facilities, Scutum X-1 has been reclassified as an intermediate-mass system containing a Mira variable star rather than an evolved high-mass star.

X-ray observations reveal hot spots and jet knots in the Spiderweb galaxy, and radio observations suggest that this galaxy gets its structure from interactions with a surrounding asymmetric gaseous environment.

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.