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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 ...
The Caldwell catalogue is an astronomical catalogue of 109 star clusters, ... 22.3 Corona Australis: 6.6 C79 NGC 3201 Globular Cluster: 17 Vela: 6.8 C80 NGC 5139 ...
NGC 559 (also known as Caldwell 8) is an open cluster and Caldwell object in the constellation Cassiopeia. It shines at magnitude +9.5. Its celestial coordinates are RA 01 h 29.5 m, dec +63° 18′. It is located near the open cluster NGC 637, and the bright magnitude +2.2 irregular variable star Gamma Cassiopeiae. The cluster is 7 arcmins ...
NGC 4449, also known as Caldwell 21, is an irregular Magellanic type galaxy in the constellation Canes Venatici, being located about 13 million light-years away. [3] It is part of the M94 Group or Canes Venatici I Group that is relatively close to the Local Group hosting our Milky Way galaxy.
NGC 7662 is a popular planetary nebula for casual observers. A small telescope will reveal a star-like object with slight nebulosity. A 6" telescope with a magnification around 100x will reveal a slightly bluish disk, while telescopes with a primary mirror at least 16" in diameter may reveal slight color and brightness variations in the ...
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Caldwell made the agonizing decision to push him off, allowing the group to run for safety. For months after the incident, Caldwell grappled with the harrowing belief he had killed a man - though ...
Sh 2-155, Caldwell 9, LBN 110.11+02.44 See also: Lists of nebulae Sh 2-155 (also designated Caldwell 9, Sharpless 155 or S155 , or LBN529 ) is a diffuse nebula in the constellation Cepheus , within a larger nebula complex containing emission, reflection, and dark nebulosity.