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    The Little Ghost Nebula is a planetary nebula. Nothing to do with planets, but they looked like planets in 18th century telescopes. Planetary nebulae form when a star like the Sun runs out of hydrogen and swells into a red giant, throwing off the outer layers of atmosphere. This often happens fairly symmetrically. (Image: Hubble Heritage Team) ©Mona Evans, “Nebulae” www.bellaonline.c...

    Ghost Nebula


    The Bubble Nebula (NGC 7635)

    Egg Nebula

    NGC 7023: The Iris Nebula

    NGC 1333

    Eyes and Nebulas. ©Mona Evans, “Nebulae” www.bellaonline.c...

    NGC 1499: The California Nebula

    The Ring Nebula (M57). A planetary nebula in the constellation Lyra. Planetary nebulae are formed when a dying sun-like star throws off its outer layers. (Credit: NASA/STScI/AURA) Mona Evans, "Lyra the Heavenly Harp" www.bellaonline.c...

    NGC 7023: The Iris Nebula

    NGC 6188

    NGC 1999

    NGC 5189

    North America Nebula NGC-7000

    Trifid Nebula NGC 6514 Nebula

    Tulip Nebula

    APOD: 2015 November 5 - NGC 1333: Stellar Nursery in Perseus

    NGC 7000

    NGC 3190

    Bubble Nebula