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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 ...
Messier 94 (also known as NGC 4736, Cat's Eye Galaxy, Crocodile Eye Galaxy, or Croc's Eye Galaxy [7] [8]) is a spiral galaxy in the mid-northern constellation Canes Venatici. It was discovered by Pierre Méchain in 1781, [ 9 ] and catalogued by Charles Messier two days later.
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: 8.4 C8 NGC 559 Open Cluster: 3.7 Cassiopeia: 9.5 C9 Sh2-155: Cave Nebula: Nebula: 2.8 Cepheus: 7.7 C10 NGC 663 ...
Cat's Eye Nebula: NGC 6543: 1786 3.3 ± 0.9 9.8B Draco: Little Ghost Nebula: NGC 6369: 1800 (prior to) 2 ± 3 ... magnitude (visual) [a] Constellation [a] Glowing Eye ...
Bow-Tie Nebula C6 NGC 6543: Cat's Eye Nebula C7 NGC 2403: C8 NGC 559: C10 NGC 663: C12 ... Apparent magnitude – NGC 2420 Open Cluster – Gemini: 8.3 – NGC 2421
Daily increase in volume of the Cat's Eye Nebula [16] 4 × 10 43: Annual increase in volume of the Cat's Eye Nebula [16] [17] 1 × 10 45: One cubic petametre ~1.7 × 10 45: Approximate volume of the Stingray Nebula [18] ~2.7 × 10 46: Volume of the bright inner nebula of the Cat's Eye Nebula [16] 5.5 × 10 46: The volume of a Bok globule like ...
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 ...
It is similar in appearance to the Cat's Eye Nebula and the Ring Nebula, whose size, ... a temperature of 120,000 Kelvin and has an apparent magnitude of 13.5.