NGC 6826

NGC 6826 is a planetary nebula in the constellation Cygnus, which is 2200 light years away from Earth. The central star of NGC 6826 is one of the brightest stars known in a planetary nebula.

Discovery

The planetary nebula NGC 6826 was discovered on September 6, 1793 by the German - British astronomer William Herschel.

Flashing effect

When observing this planetary nebula with a telescope, this one seems to blink. This effect has earned him the nickname Blinking Planetary. But the fog itself is not flashing. The flashing is caused by our eyes. If you look directly to the central star, he faded the fog. But if one looks a bit past it, the fog reappears.