Vasily Belokurov

For decades astronomers puzzled over mysterious anti-correlations of light elements in globular clusters. New research based on high-resolution cosmological simulations shows: the chemical anomalies could have arisen long before the birth of the cluster's first stars—in giant gas clouds. This scenar

Using the STRRINGS catalog of 32 stellar streams, astronomers have for the first time measured the population distribution of dark matter halo shapes beyond the Local Group. Applying Bayesian analysis, they found that for the 17 most reliable streams, the median flattening is about 0.72 — meaning th