行星状星云是相对较轻的恒星（质量小于太阳的8倍），不会发生超新星爆炸，在恒星生命结束时形成的天体。像太阳这样的恒星在晚年会从主序星演化成红巨星，并从外层向周围释放气体和尘埃。不久，失去气体的恒星将进入从红巨星向白矮星转变的阶段（中心恒星），释放出的气 ...

A new image released by NASA shows what could be a captivating — and terrifying — event roughly 650 light-years away: a dying ...

A new X-ray look at the mesmerizing Helix Nebula reveals an alleged planet killer: a white dwarf that might be the source of ...

Scientists have been receiving X-ray signals from the Helix Nebula for decades, but now they believe it may hide a horrifying ...

This colorful image of the Helix nebula may mirror what someday could become of our sun and our home planet. Released on ...

This image of the Helix Nebula, released on March 4, 2025, shows a potentially destructive white dwarf at the nebula's center ...

A 40-year-old space enigma has been unraveled: a white dwarf star at the center of the Helix Nebula has been annihilating a ...

This color-composite image of the Helix Nebula was created from images obtained using the the Wide Field Imager, an astronomical camera attached to the 2.2 meter Max-Planck Society/ESO telescope ...

NGC 7293, better known as the Helix nebula, displays its ultraviolet glow courtesy of NASA's Galaxy Evolution Explorer (GALEX ...

Since the 1980s, a strange X-ray emission has puzzled astronomers. At the heart of the Helix Nebula, a dying star may have destroyed a neighboring planet, revealing a rare and spectacular phenomenon.

In this image from NASA's Spitzer Space Telescope, "cometary knots" on the Helix Nebula show blue-green heads caused by excitation of their molecular material from shocks or ultraviolet radiation.