From the January 2010 issue

Watch a pulsar’s plasma erupt

Scientists using NASA's Fermi Gamma-ray Space Telescope have discovered pulsars that apparently pulse only in gamma rays.
By | Published: January 25, 2010 | Last updated on May 18, 2023

Pulsars rank among the most exotic objects astronomers have ever discovered. These cosmic powerhouses are the crushed remains of massive stars. When such a star exhausts its nuclear fuel, its core collapses.