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Little Ghost Nebula. (NGC 6369) (Credit: Hubble Heritage Team, NASA) A planetary nebula in the constellation Ophiucus over 2000 light years away. William Herschel discovered it in the18th century. It's round like a planet, but was actually formed from material ejected by a dying star. What remains of the star is the white dwarf near the center. The nebula's main ring structure is about a light-year across. Mona Evans, “Nebulae” http://www.bellaonline.com/articles/art43407.asp

What created the Waterfall Nebula? No one knows. The structure seen in the region of NGC 1999 in the Great Orion Molecular Cloud complex is one of the more mysterious structures yet found on the sky.

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10 Most Impressive Photos of our Universe

The Cat's Eye Nebula (NGC 6543) is a planetary nebula in the constellation of Draco. Structurally, it is one of the most complex nebulae known, with high-resolution Hubble Space Telescope observations revealing remarkable structures such as knots, jets and sinewy arc-like features. It was discovered by William Herschel on February 15, 1786, and was the first planetary nebula whose spectrum was investigated, by the English amateur astronomer William Huggins in 1864.

The Medusa Nebula (Oct 25 2012) Image Credit & Copyright: Ken Crawford (Rancho Del Sol Obs.) Explanation: Braided, serpentine filaments of glowing gas suggest this nebula's popular name, The Medusa Nebula. Also known as Abell 21, this Medusa is an old planetary nebula some 1,500 light-years away in the constellation Gemini. Like its mythological namesake, the nebula is associated with a dramatic transformation. The planetary nebula phase represents a final stage (...) #space #astronomy

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We Are Not Alone, Carina Nebula Blue Green

A pillar of gas in the Carina Nebula is bathed in the light of hot, massive stars. Photo of Carina Nebula Pillar. Poster on VintPrint.com.

In 1995, a now famous picture from the Hubble Space Telescope featured Pillars of Creation, star forming columns of cold gas and dust light-years long inside M16, the Eagle Nebula. This remarkable false-color composite image revisits the nearby stellar nursery with image data from the orbiting Herschel Space Observatory and XMM-Newton telescopes. Herschel's far infrared detectors record the emission from the region's cold dust directly, including the famous pillars and other structures near…

NGC 6302 (The Butterfly Nebula): With an estimated surface temperature of about 250,000 degrees C, the central star of this particular planetary nebula is exceptionally hot -- shining brightly in ultraviolet light but hidden from direct view by a dense torus of dust. This dramatically detailed close-up of the dying star's nebula was recorded by the newly upgraded Hubble Space Telescope. Credit: NASA, ESA, and the Hubble SM4 ERO Team