The collision between high-speed solar wind streams and coronal mass ejections can cause geomagnetic storms, often with signatures very different from the typical storms from interacting solar wind streams.

X-ray polarization measurements provide a way to estimate the spins of accreting stellar-mass black holes that is independent of other estimation methods.

Thick disks of stars may make up anywhere from a few percent to 100% of the mass of galactic disks, with the proportion likely depending on the galaxy’s star formation and merger history.

Researchers use observations of 65,951 giant pulses to investigate the pulse properties of the pulsar at the center of the Crab Nebula, a famous supernova remnant.

Dynamical friction due to the presence of a dark matter density spike may account for the observed rate of orbital decay of a supermassive black hole binary.

Dust plays an important role in creating Mercury’s tenuous exosphere and weathering its surface; new measurements from BepiColombo will advance our understanding of dust’s effects on Mercury.