“The Helix Nebula in Hydrogen and Oxygen” from NASA

Every day NASA releases a different photograph or image or video of our expanding universe, along with a professional description by a professional astronomer. NASA calls this the “Astronomy Picture Of The Day, or APOD for short. Today it was this fantastic image “The Helix Nebula in Hydrogen and Oxygen.” Karl Ludwig Harding discovered Helix Nebula in 1824.
The Helix Nebula in Hydrogen and Oxygen
The Helix Nebula in Hydrogen and Oxygen

“Is the Helix Nebula looking at you? No, not in any biological sense, but it does look quite like an eye. The Helix Nebula is so named because it also appears that you are looking down the axis of a helix. In actuality, it is now understood to have a surprisingly complex geometry, including radial filaments and extended outer loops. The Helix Nebula (aka NGC 7293) is one of brightest and closest examples of a planetary nebula, a gas cloud created at the end of the life of a Sun-like star. The remnant central stellar core, destined to become a white dwarf star, glows in light so energetic it causes the previously expelled gas to fluoresce. The featured picture, taken in the light emitted by oxygen (shown in blue) and hydrogen (shown in red), was created from 74 hours of exposure over three months from a small telescope in a backyard of suburban Melbourne, Australia. A close-up of the inner edge of the Helix Nebula shows complex gas knots of unknown origin.”
Image and text provided by NASA
Helix Nebula
Helix Nebula, planetary nebula.
Helix Nebula is located in the Aquarius constellation . It was discovered in 1824 Karl Ludwig Harding
Melbourne
Melbourne, capital city of Victoria, Australia.