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

NGC 6888 - Crescent Nebula, is a cosmic bubble about 25 ly across, blown by winds from its central, bright, massive star. NGC 6888's central star is classified as a Wolf-Rayet star (WR 136). NGC 6888 is about 5000 ly away in the constellation Cygnus.

The Helix Nebula

NGC 5189: An Unusually Complex Planetary Nebula - NGC 5189 spans about three light years and lies about 3,000 light years away toward the southern constellation of the Fly (Musca). - Image Credit: NASA, ESA, Hubble Heritage Team

planetary nebula | The Blinking Eye Nebula, a planetary nebula in Cygnus

NGC 6069 Veil Nebula | by astrochuck

Planetary Nebula NGC 2818 from Hubble Image Credit: NASA, ESA, Hubble Heritage Team (STScI / AURA)

The Horsehead Nebula 1500 light years away, it is a dark cloud that is visible only because of the lighter nebula behind it.

Eagle Nebula

The Crab Nebula

NGC 7635: The Bubble Nebula .

Cat's Eye Nebula

NGC 6357 - War and Peace Nebula.

NGC 5189

The Unicorn Constellation

butterfly nebula

NGC 6188 and NGC 6164

Waterfall nebula

This photo from NASA's Hubble Space Telescope shows an ominous pillar of gas and dust known as the Cone Nebula. The image shows the top portion of the nebula that is 2.5 light years in height. The Cone Nebula is 2,500 light-years from Earth in the Monoceros constellation. The red halo of light seen around the pillar is caused when ultraviolet radiation causes hydrogen gas in the nebula to glow.

A Beautiful Trifid Image Credit & Copyright: R Jay Gabany The beautiful Trifid Nebula is a cosmic study... aka M20, it lies about 5,000 LYrs away 2ward the nebula rich constellation Sagittarius. A star forming region in the plane of r galaxy, the Trifid illustrates 3 diff types of astronomical nebulae; red emission nebulae dominated by light emitted by hydrogen atoms, blue reflection nebulae produced by dust reflecting starlight, and dark nebulae where dense dust clouds appear in silhoue...