NASA says this white dwarf was 'particularly destructive' and may have engulfed a nearby planet. A statement from the space agency reads: "This image of the Helix Nebula, released ...

A new X-ray look at the mesmerizing Helix Nebula reveals an alleged planet killer: a white dwarf that might be the source of strange emissions from the nebula. The Helix Nebula, also known as Caldwell ...

A new view of the Helix Nebula reveals a dying white dwarf star at the nebula's center. This star's violent eating habits could be responsible for strange X-ray emissions in the region.