For over forty years, astronomers have been baffled by X-rays from the white dwarf at the center of the Helix Nebula. A white ...

This image of the Helix Nebula, released on March 4, 2025, shows a potentially destructive white dwarf at the nebula's center ...

Traditional pulsars, produced by neutron stars, produce radio signals ... containing more blue than a typical red dwarf of ...