For the first time, researchers have measured from cosmological simulations a parameter relevant to fluctuations in the density of baryonic matter in the early universe.
When NASA smashed a spacecraft into an asteroid in 2022, it shot a shower of particles into space; these particles might impact Earth, the Moon, or Mars in roughly 7 years.
Neutrino flux from discrete sources within our galaxy could be responsible for 20% of the diffuse neutrino flux up to about 10 teraelectronvolts, and it could account for 50% of the flux at higher energies.
Supernova remnants might collapse when they collide with the surrounding interstellar medium, triggering the formation of dense, chemically enriched clouds that could be the site of star formation.
Alexander W. Raymond et al 2024 AJ 168 130
The new measurements represent the highest diffraction-limited angular resolution ever obtained from Earth’s surface and show proof of concept for high-angular-resolution observations of black holes.
A new catalog provides a wealth of data from 140 fast radio bursts, updating or providing for the first time the polarization, raw voltage, and localization information for these bursts.