There's a nebula shaped exactly like a human eye
And it's 700 light-years away, watching back.
Seven hundred light-years from Earth, nestled within the constellation Aquarius, a cosmic gaze holds steady. This is the Helix Nebula, NGC 7293, a celestial structure so profoundly symmetrical it mirrors an ocular orb.
This "Eye of God" presents a vibrant, albeit fleeting, portrait of stellar demise. The intense ultraviolet radiation from the nebula's central white dwarf star — the former core of a sun-like star — strips electrons from the expelled gas, causing it to fluoresce. The resulting ring-like structure is not a solid sphere, but rather a shell of ejected material, expanding into the void. Its appearance as an eye is a trick of perspective; we view it largely pole-on, through a transparent, expanding bubble of gas and dust.
The Helix Nebula offers a profound, if melancholic, premonition of our own star's eventual fate. In roughly five billion years, our Sun will similarly shed its outer layers, contracting into a white dwarf and illuminating a brief, ethereal planetary nebula.
The Helix Nebula spans about 2.5 light-years across.
