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  2. Cat's Eye Nebula - Wikipedia

    en.wikipedia.org/wiki/Cat's_Eye_Nebula

    The Cat's Eye Nebula (also known as NGC 6543 and Caldwell 6) is a planetary nebula in the northern constellation of Draco, discovered by William Herschel on February 15, 1786. It was the first planetary nebula whose spectrum was investigated by the English amateur astronomer William Huggins , demonstrating that planetary nebulae were gaseous ...

  3. Caldwell catalogue - Wikipedia

    en.wikipedia.org/wiki/Caldwell_catalogue

    Bow-Tie Nebula: Planetary Nebula: 3.5 Cepheus: 11 C3 NGC 4236 Barred Spiral Galaxy: 7,000 Draco: 9.7 C4 NGC 7023: Iris Nebula: Open Cluster and Nebula: 1.4 Cepheus: 7 C5 IC 342: Hidden Galaxy [7] Spiral Galaxy: 10,000 Camelopardalis: 9 C6 NGC 6543: Cat's Eye Nebula: Planetary Nebula: 3 Draco: 9 C7 NGC 2403 Spiral Galaxy: 14,000 Camelopardalis ...

  4. The Scale of the Universe - Wikipedia

    en.wikipedia.org/wiki/The_Scale_of_the_Universe

    Cat's Eye Nebula: 3.5 × 10 15 meters 2.5 × 10 15 meters Hourglass Nebula — 3 × 10 15 meters Blinking Nebula — 4.5 × 10 15 meters Light year: 9.5 × 10 15 meters 10 16 meters Rotten Egg Nebula — 1 light year 1.4 × 10 16 meters Ring Nebula: 1.3 × 10 16 meters 2 light years 1.7 × 10 16 meters Oort cloud: 1.5 × 10 15 meters 2 light ...

  5. List of planetary nebulae - Wikipedia

    en.wikipedia.org/wiki/List_of_planetary_nebulae

    Download as PDF; Printable version; In other projects Wikimedia Commons; ... Cat's Eye Nebula: NGC 6543: 1786 3.3 ± 0.9 9.8B Draco: Little Ghost Nebula: NGC 6369: 1800

  6. Category:Caldwell objects - Wikipedia

    en.wikipedia.org/wiki/Category:Caldwell_objects

    Download as PDF; Printable version; In other projects Wikimedia Commons; ... Iris Nebula; IC 342; Cat's Eye Nebula; NGC 2403; NGC 559; Sh 2-155; NGC 663; Bubble ...

  7. Saving Mt. Wilson Observatory: Inside the long battle ... - AOL

    www.aol.com/news/saving-mt-wilson-observatory...

    On the night of Oct. 5, 1923, Hubble pointed the 100-inch telescope toward M31, a blob of faint light then known as the Andromeda nebula. The human eye only collects up to 0.2 seconds of visual ...

  8. Portal : Astronomy/Picture/26 June 2005 - Wikipedia

    en.wikipedia.org/wiki/Portal:Astronomy/Picture/...

    The Cat's Eye Nebula is one of the most intricate and complex planetary nebulae known. This Hubble Space Telescope image reveals a mass of twists and knots of material in the nebula's inner region. The origin of this structure is not yet well understood by astronomers .

  9. Play Hearts Online for Free - AOL.com

    www.aol.com/games/play/masque-publishing/hearts

    Enjoy a classic game of Hearts and watch out for the Queen of Spades!