Gamma-ray bursts (GRBs) are intense bursts of gamma radiation, typically generating more energy in a few seconds than the sun will produce over its ten-billion-year lifetime. These transient phenomena ...

Uniquely combining astrophysics and planetary science, the Department of Astrophysical and Planetary Sciences provides students with a unified view of space sciences; the solar system and comparative ...

The National Academies of Sciences, Engineering, and Medicine are the nation's pre-eminent source of high-quality, objective advice on science, engineering, and health matters. Top experts participate ...