How does a black hole’s rotation affect the motion of matter that gets close to the event horizon? New work explores the complicated structure of bound orbits and shows the fate of particles in this situation.
A new survey resulted in the discovery of 25 low-latitude quasars that lack previous spectroscopy, filling a gap in our knowledge of ultraviolet-bright quasars in this region.
Among the 10 newly discovered millisecond pulsars are six in short-period binary systems; this survey suggests that previous surveys were biased against such systems, which may be common.
Researchers put their heads together to devise a way to detect surface regions that might provide evidence for past freeze/thaw cycles on Mars.
The question of how some supernova progenitor stars undergo outbursts so energetic that their envelopes should come unbound could be resolved by the presence of a compact binary companion.
Q. A. Ge et al 2024 AJ 168 25
As researchers use older and older stars to trace the position of the Milky Way’s spiral arms, the location of the Perseus Arm shifts away from the galactic center.