description Blinking Planetary Overview
The Blinking Planetary, designated NGC 6826, is a planetary nebula located in the constellation Cygnus. It was discovered by the astronomer William Herschel in 1793 and is named for an optical illusion where its central star appears to blink. When viewed directly, the central star is visible, but using averted vision makes the surrounding nebulosity fade. This celestial object is popular among amateur astronomers for its distinct visual effects.
help Blinking Planetary FAQ
Why does NGC 6826 appear to blink?
When an observer looks directly at its bright central star, the faint surrounding nebula becomes harder to see. Looking slightly to the side engages more light-sensitive peripheral vision, making the shell reappear and creating the blinking effect.
Where can observers find the Blinking Planetary Nebula?
NGC 6826 lies in the constellation Cygnus. A telescope is normally needed to separate its small bluish disk from the surrounding star field.
Is the Blinking Planetary actually a planet?
No. A planetary nebula is glowing gas expelled by a dying star, and the historical name comes from its planet-like appearance in early telescopes.
Who discovered NGC 6826?
William Herschel discovered the nebula in 1793. Its NGC designation comes from the later New General Catalogue assembled by J. L. E. Dreyer.
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