A decades-old astronomical mystery has finally been solved—an enigmatic X-ray signal emanating from deep space turns out to be the death ... The Helix Nebula, often called the “Eye of God ...

After tracking a puzzling X-ray signal from a dying star for decades ... as the death knell from a planet that was destroyed by the white dwarf in the Helix Nebula," said lead author Sandino ...

Helix Nebula: This a planetary nebula, which is formed when a star like the Sun runs out of fuel, expands and its outer layers puff off, and then the core of the star shrinks. Orion Nebula ...