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- Westerlund_1 abstract "Westerlund 1 (also called Ara Cluster, designated Wd1) is a compact young super star cluster in the Milky Way galaxy, about 3.5–5 kpc away from Earth. In fact, it is the most massive compact young star cluster known in the entire Local Group of galaxies. It was discovered by Bengt Westerlund in 1961 but remained largely unstudied for many years due to high interstellar extinction (absorption) in its direction. In the future, it will probably evolve into a globular cluster.The cluster contains a large number of rare, evolved, high-mass stars, including: 6 yellow hypergiants, 4 red supergiants, 24 Wolf-Rayet stars, a luminous blue variable, many OB supergiants, and an unusual supergiant sgB[e] star which has been proposed to be the remnant of a recent stellar merger. In addition, X-ray observations have revealed the presence of the anomalous X-ray pulsar CXO J164710.2-455216, a slow rotating neutron star that must have formed from a high-mass progenitor star. Westerlund 1 is believed to have formed in a single burst of star formation, implying the constituent stars have similar ages and compositions.Aside from hosting some of the most massive and least-understood stars in the galaxy, Westerlund 1 is useful as an example of a relatively nearby, so easier to observe, super star cluster to help astronomers determine what occurs within extragalactic super star clusters.".
- Westerlund_1 thumbnail Surprise_Cloud_Around_Vast_Star.jpg?width=300.
- Westerlund_1 wikiPageExternalLink AladinPreview?-c=16+47+04.00-45+51+04.9&ident=ESO+277-12&submit=Aladin+previewer.
- Westerlund_1 wikiPageExternalLink sim-id?Ident=ARA+CLUSTER&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- Westerlund_1 wikiPageExternalLink SEMZR97DWZE_index_0.html.
- Westerlund_1 wikiPageID "7175685".
- Westerlund_1 wikiPageRevisionID "602138197".
- Westerlund_1 caption "Westerlund 1.".
- Westerlund_1 class "Open cluster".
- Westerlund_1 constellation Ara_(constellation).
- Westerlund_1 distLy "approx. 12000–16000 ly".
- Westerlund_1 distPc "3500".
- Westerlund_1 epoch Epoch_(astronomy).
- Westerlund_1 hasPhotoCollection Westerlund_1.
- Westerlund_1 name "Westerlund 1".
- Westerlund_1 names "Ara Cluster, Westerlund 1, ESO 277-12, C 1644-457, VDBH 197".
- Westerlund_1 simbad "ARA+CLUSTER".
- Westerlund_1 subject Category:Ara_(constellation).
- Westerlund_1 subject Category:ESO_objects.
- Westerlund_1 subject Category:Open_clusters.
- Westerlund_1 subject Category:Super_star_clusters.
- Westerlund_1 subject Category:Westerlund.
- Westerlund_1 comment "Westerlund 1 (also called Ara Cluster, designated Wd1) is a compact young super star cluster in the Milky Way galaxy, about 3.5–5 kpc away from Earth. In fact, it is the most massive compact young star cluster known in the entire Local Group of galaxies. It was discovered by Bengt Westerlund in 1961 but remained largely unstudied for many years due to high interstellar extinction (absorption) in its direction.".
- Westerlund_1 label "Westerlund 1".
- Westerlund_1 label "Westerlund 1".
- Westerlund_1 label "Westerlund 1".
- Westerlund_1 label "Westerlund 1".
- Westerlund_1 label "Westerlund 1".
- Westerlund_1 label "Westerlund 1".
- Westerlund_1 label "Westerlund 1".
- Westerlund_1 label "維斯特盧1".
- Westerlund_1 sameAs Westerlund_1.
- Westerlund_1 sameAs Westerlund_1.
- Westerlund_1 sameAs Westerlund_1.
- Westerlund_1 sameAs Westerlund_1.
- Westerlund_1 sameAs Westerlund_1.
- Westerlund_1 sameAs Westerlund_1.
- Westerlund_1 sameAs m.025v6yx.
- Westerlund_1 sameAs Q2296213.
- Westerlund_1 sameAs Q2296213.
- Westerlund_1 wasDerivedFrom Westerlund_1?oldid=602138197.
- Westerlund_1 depiction Surprise_Cloud_Around_Vast_Star.jpg.
- Westerlund_1 isPrimaryTopicOf Westerlund_1.