FEELING THE PRESSURE Extreme pressures are found within the proton, scientists report. The proton contains three particles called quarks (illustrated) as well as gluons, which hold the particle together.
STAR START Scientists find evidence that stars formed in a faraway galaxy (indicated by the boxes) when the universe was just 250 million years old.
NASA, ESA, W. Zheng/JHU, M. Postman/STScI and the CLASH Team
HIDDEN DEPTHS Evidence is growing that plumes of water erupt through the icy surface of Jupiter’s moon Europa, seen in this composite image taken by the Galileo spacecraft in the late 1990s.