Washington: A mysterious X-ray signal from the Helix Nebula has puzzled scientists for over 40 years. Now, new research suggests that a white dwarf known as the dense core of a dead star may have ...

The mysterious X-rays could be the by-product of that annihilation. The Helix Nebula is an astounding ring of glowing gas with the star at its center. It was a star much like the Sun, but when it ...

The Helix Nebula, also known as Caldwell 63, is 650 light-years from Earth, according to NASA. It's the remains of a dying star, which is gradually shedding its outer gas layers into the ...

Recent research has uncovered what appears to be the grizzly death of an exoplanet in the nearby Helix Nebula, which seems to have been devoured by a dying star. Researchers have been detecting X ...