the Helix nebula (also known as NGC 7293 or Caldwell 63) is a planet nebula It is located in the constellation of Aquarius. It was discovered by Carl Ludwig Harding, probably before 1824. This object is one One of the closest planetary nebulae to Earthat a distance measured by the Gaia mission, About 655 light years away.
A planetary nebula is an emission nebula that consists of an expanding spherical wave of ionized gas that extends into space from a star due to successive explosions, marking the end of its life cycle.
It is similar in appearance to the Cat’s Eye Nebula and the Ring Nebula, being similar in size, age, and physical properties to the Dumbbell Nebula, differing only in its relative proximity and appearance from the equatorial angle of view.
The Helix Nebula is sometimes referred to as the “Eye of God” due to its shape, but also as the “Eye of Sauron”. It was filmed from a suburb of Patras and was the result of 20 exposure photos of 5 minutes each, through telescope Focal depth of 1422 mm and an absorption filter of light spectra of Ha and Oiii.
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