Dougal Mackey et al 2018 ApJL 858 L21

A new panoramic imaging survey, conducted with the Dark Energy Camera, maps out the substructures and tidal distortions evident in the Magellanic periphery to constrain the interaction history of the Clouds.

Ru-Sen Lu et al 2018 ApJ 859 60

Very long baseline interferometric observations of the supermassive black hole in the galactic center, Sgr A*, suggest the presence of compact intrinsic source structure on scales of ~3 Schwarzschild radii.

Setthivoine You et al 2018 ApJS 236 29

The Mochi LabJet, a laboratory astrophysics experiment, was used to demonstrate the process of astrophysical jet production by mimicking conditions of an accretion disk threaded by a poloidal magnetic field.

Z. Arzoumanian et al 2018 ApJ 859 47

11 years of data from NanoGRAV place constraints on a population of inspiraling supermassive black hole binaries, a network of decaying cosmic strings, and a primordial gravitational-wave background.

Aaron E. Watkins et al 2018 ApJL 858 L16

A vast cloud of ionized gas was discovered 32 kpc north of the interacting system M51. The gas may have been expelled from the inner regions of the M51 system and subsequently ionized by shocks or a fading AGN.

Darryl Seligman and Gregory Laughlin 2018 AJ 155 217

Based on expected arrival rates of interstellar asteroids like ‘Oumuamua, and with the detection capabilities of LSST, wait times of ~10 years are likely between opportunities to intercept such asteroids with spacecraft.