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.
A global network of robotic telescopes helps test a new way of measuring oscillation modes of massive stars; successful measurements of these modes may unlock these stars’ interior structures.
The interstellar media of dwarf galaxies — defined in this work as galaxies with total stellar mass less than about 3 billion times the mass of the Sun — haven’t changed much over the past 7.8 billion years.