Feng Wang

In the dense star cluster NGC 6791, which is older than the Sun and rich in heavy elements, the light from many stars blends into a common glow. Astronomers set out to disentangle this light into individual stars using data from the Gaia space telescope.

To determine the size of the proton cloud in an atomic nucleus, physicists collide an unstable nucleus with a target and observe how many protons it loses. The larger the projectile nucleus, the more often it grazes target nuclei and loses particles.