Caldwell 13, also known as the Owl Cluster, the E.T. Cluster or NGC 457, is an open cluster of stars in the constellation Cassiopeia, discovered by William Herschel in 1787. It lies roughly 7,900 to 9,100 light-years from Earth, and two of its brighter member stars form a pair of bright points that observers have likened to a pair of glowing eyes within the cluster's owl-like outline.
Facts
Classification
Constellation CatalogueNew General Catalogue (NGC) 1 Discovery Year In the Other Atlases
In Constellation
Also in Divinity Atlas: the constellation this subject lies in.
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia Foundation
2. Wikidata: Caldwell 13
Wikidata Q730450, class allow-list match (w-wdresolver-0926)View the Source NGC 457 (Wikipedia)
Caldwell 13, Wikipedia - lead section, catalogue classification
NGC 457 is an open cluster of stars in the northern constellation of Cassiopeia.
NGC 457, Wikipedia - lead section, constellation
NGC 457 is an open cluster of stars in the northern constellation of Cassiopeia.
In Group: Open Clusters, Lead sentence
NGC 457 is an open cluster of stars in the northern constellation of Cassiopeia.
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