Coverage is expanded to include new content on high energy physics, the propagation of protons and nuclei in cosmic background radiation, neutrino astronomy, high-energy and ultra-high-energy cosmic ...

High-energy particles, known as cosmic rays, provide a window into some of the most extreme environments in the universe.

NASA’s Chandra and Hubble reveal the Guitar Nebula, sculpted by pulsar PSR B2224+65. A cosmic marvel showcasing pulsar winds, ...