Within this nebula, the hot core of the star remains ... Eventually—over tens or even hundreds of billions of years—a white dwarf cools until it becomes a black dwarf, which emits no energy.

A decades-old cosmic mystery may finally be solved. Scientists now suspect that the strange X-ray glow from a distant white ...

In the center lies the remnant of that old star – a white dwarf. Since 1980, observatories studying this nebula have detected high-energy X-rays coming from the white dwarf at its core.

The center of the nebula is home to the white dwarf WD ... or gently sheds its outer layers and becomes a white dwarf. Any ...

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 ...

A planet killer capable of ripping them to pieces has been discovered, say space scientists. Researchers believe they've found evidence that a white dwarf may have torn a Jupiter-sized planet apart.

A white dwarf is the final stage in the evolution of low to medium mass stars, like our Sun. When such a star exhausts its nuclear fuel, it expels its outer layers into space, forming a planetary ...

as the death knell from a planet that was destroyed by the white dwarf in the Helix Nebula,” said lead author Sandino Estrada-Dorado of the National Autonomous University of Mexico.

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. Observations from the ...