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- Double_Cluster abstract "The Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. NGC 869 and NGC 884 both lie at a distance of 7500 light years. NGC 869 has a mass of 3700 solar masses and NGC 884 weighs in at 2800 solar masses; however, later research has shown both clusters are surrounded with a very extensive halo of stars, with a total mass for the complex of at least 20,000 solar masses. Based on their individual stars, the clusters are relatively young, both 12.8 million years old. In comparison, the Pleiades have an estimated age ranging from 75 million years to 150 million years. There are more than 300 blue-white super-giant stars in each of the clusters. The clusters are also blueshifted, with NGC 869 approaching Earth at a speed of 39 km/s (24 mi/s) and NGC 884 approaching at a similar speed of 38 km/s (24 mi/s). Their hottest main sequence stars are of spectral type B0.".
- Double_Cluster thumbnail Double_Cluster.jpg?width=300.
- Double_Cluster wikiPageExternalLink ap091204.html.
- Double_Cluster wikiPageExternalLink n0869.html.
- Double_Cluster wikiPageExternalLink double_cluster.html.
- Double_Cluster wikiPageExternalLink enlarge.php?fileBase=clusters_2.
- Double_Cluster wikiPageID "8960524".
- Double_Cluster wikiPageLength "6836".
- Double_Cluster wikiPageOutDegree "23".
- Double_Cluster wikiPageRevisionID "699717181".
- Double_Cluster wikiPageWikiLink Astronomy_Picture_of_the_Day.
- Double_Cluster wikiPageWikiLink Blueshift.
- Double_Cluster wikiPageWikiLink Caldwell_catalogue.
- Double_Cluster wikiPageWikiLink Cassiopeia_(constellation).
- Double_Cluster wikiPageWikiLink Category:Asterisms_(astronomy).
- Double_Cluster wikiPageWikiLink Category:Astronomical_objects_known_since_antiquity.
- Double_Cluster wikiPageWikiLink Category:Caldwell_objects.
- Double_Cluster wikiPageWikiLink Category:Open_clusters.
- Double_Cluster wikiPageWikiLink Circumpolar_star.
- Double_Cluster wikiPageWikiLink Light-year.
- Double_Cluster wikiPageWikiLink NGC_869.
- Double_Cluster wikiPageWikiLink NGC_884.
- Double_Cluster wikiPageWikiLink Open_cluster.
- Double_Cluster wikiPageWikiLink Perseids.
- Double_Cluster wikiPageWikiLink Perseus_(constellation).
- Double_Cluster wikiPageWikiLink Pleiades.
- Double_Cluster wikiPageWikiLink Radiant_(meteor_shower).
- Double_Cluster wikiPageWikiLink Stellar_classification.
- Double_Cluster wikiPageWikiLink William_Herschel.
- Double_Cluster wikiPageWikiLink File:Double_Cluster.jpg.
- Double_Cluster wikiPageWikiLink File:The_Double_Cluster_in_Perseus.jpg.
- Double_Cluster wikiPageWikiLinkText "Double Cluster".
- Double_Cluster appmagV "3.7".
- Double_Cluster constellation Perseus_(constellation).
- Double_Cluster dec "57".
- Double_Cluster distLy "7.5".
- Double_Cluster distPc "2300".
- Double_Cluster epoch "J2000.0".
- Double_Cluster name "Double Cluster".
- Double_Cluster names "Caldwell 14".
- Double_Cluster ra "8400.0".
- Double_Cluster sizeV "60".
- Double_Cluster wikiPageUsesTemplate Template:Caldwell_catalogue.
- Double_Cluster wikiPageUsesTemplate Template:Citation_needed.
- Double_Cluster wikiPageUsesTemplate Template:Convert.
- Double_Cluster wikiPageUsesTemplate Template:Infobox_open_cluster.
- Double_Cluster wikiPageUsesTemplate Template:Reflist.
- Double_Cluster wikiPageUsesTemplate Template:WikiSky.
- Double_Cluster subject Category:Asterisms_(astronomy).
- Double_Cluster subject Category:Astronomical_objects_known_since_antiquity.
- Double_Cluster subject Category:Caldwell_objects.
- Double_Cluster subject Category:Open_clusters.
- Double_Cluster hypernym Name.
- Double_Cluster type Catalogue.
- Double_Cluster type Grouping.
- Double_Cluster type Object.
- Double_Cluster type Redirect.
- Double_Cluster type Grouping.
- Double_Cluster comment "The Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 869 and NGC 884 (often designated h Persei and χ Persei, respectively), which are close together in the constellation Perseus. NGC 869 and NGC 884 both lie at a distance of 7500 light years.".
- Double_Cluster label "Double Cluster".
- Double_Cluster sameAs Q1327951.
- Double_Cluster sameAs Dvojitá_hvězdokupa.
- Double_Cluster sameAs Διπλό_Σμήνος.
- Double_Cluster sameAs Cúmulo_Doble_de_Perseo.
- Double_Cluster sameAs Double_amas_de_Persée.
- Double_Cluster sameAs Ha_i_Xi.
- Double_Cluster sameAs Ammasso_Doppio_di_Perseo.
- Double_Cluster sameAs 二重星団.
- Double_Cluster sameAs 이중성단.
- Double_Cluster sameAs Dobbelthopen.
- Double_Cluster sameAs Podwójna_gromada_Perseusza.
- Double_Cluster sameAs m.027r9_l.
- Double_Cluster sameAs Roiul_Dublu_din_Perseu.
- Double_Cluster sameAs กระจุกดาวแฝด.
- Double_Cluster sameAs Q1327951.
- Double_Cluster sameAs 雙星團.
- Double_Cluster wasDerivedFrom Double_Cluster?oldid=699717181.
- Double_Cluster depiction Double_Cluster.jpg.
- Double_Cluster isPrimaryTopicOf Double_Cluster.
