Simulations show that impacts can produce deposits of iron-rich material thick enough to account for lunar magnetic anomalies, but the predicted distribution of material doesn’t match observations.
If caused by a second black hole, the 11-year and 0.9-year periodic behaviors seen in Messier 87’s jet would be due to a black hole with a mass between a few million and a few billion solar masses.
Using the Atacama Large Millimeter/submillimeter Array, researchers have detected multiple sulfur-containing species; the data support a formation pathway for S2H molecules on the surfaces of dust grains.
A search for young objects on the outskirts of noninteracting dwarf galaxies raises questions about how star-forming gas clouds can form in the extreme environment of these galaxies’ outer stellar disks.
Gaia data support a scenario in which an open cluster was unbound by a nearly head-on collision with a massive giant molecular cloud; this may be the first known catastrophically disrupted open cluster.
High-resolution observations with ALMA display possible substructure in the disk surrounding a brown dwarf, yielding new insights into planet formation in the very low-mass regime.