In previous decades, the Einstein X-ray Observatory and ROSAT telescopes detected highly energetic X-rays coming from the white dwarf at the center of the Helix Nebula named WD 2226-210, located ...

The center of the nebula is home to the white dwarf WD 2226-210, the dense core of a medium-mass star, which has been the source of an astronomical mystery for decades.

Within this nebula, the hot core of the star remains—crushed to high density by gravity—as a white dwarf with temperatures over 180,000 degrees Fahrenheit (100,000 degrees Celsius).

The smoking gun of the creation of lithium in explosions on white dwarf stars may have been found, in a spike of gamma rays ...

Since 1980, observatories studying this nebula have detected high-energy X-rays coming from the white dwarf at its core. Since these objects don’t normally emit X-rays, the signals have stumped ...

A new image released by NASA shows what could be a captivating — and terrifying — event roughly 650 light-years away: a dying white dwarf that may have taken a planet out with it. The ...

Decades of constant X-ray emission from the Helix Nebula’s white dwarf suggest debris from a Jupiter-sized planet steadily rains upon the star.

The Owl Nebula is an example of a planetary nebula — a type of object that yields glimpses of stellar death in slow motion.

A white dwarf, or dying star, ... Dating back to 1980, X-ray missions have picked up an unusual reading from the centre of the Helix Nebula.

“Not all, but some white dwarfs transition from being hydrogen- to helium-dominated on their surface,” Caiazzo explained. “We might have possibly caught one such white dwarf in the act.” ...