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- Messier_108 abstract "Messier 108 (also known as NGC 3556) is a barred spiral galaxy in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 or 1782. From the perspective of the Earth, this galaxy is seen almost edge-on.This galaxy is an isolated member of the Ursa Major Cluster of galaxies in the Virgo supercluster. It has a morphological classification of type SBbc in the de Vaucouleurs system, which means it is a barred spiral galaxy with somewhat loosely wound arms. The maximum angular size of the galaxy in the optical band is 11′.1 × 4′.6, and it is inclined 75° to the line of sight.This galaxy has an estimated mass of 125 billion times the mass of the Sun and includes about 290 ± 80 globular clusters. Examination of the distribution of neutral hydrogen in this galaxy shows shells of expanding gas extending for several kiloparsecs, known as H1 supershells. These may be driven by bursts of star formation activity, resulting in supernovae explosions. Alternatively they may result from an infall of gas from outside the galaxy or by radio jets.Observations with the Chandra X-ray Observatory have identified 83 X-ray sources, including a source located at the nucleus. The brightest of these sources may be an intermediate-mass black hole that is accreting matter. The galaxy is also emitting a diffuse soft X-ray radiation within 10 kpc of the optical galaxy. The spectrum of the X-ray source at the core is consistent with an active galactic nucleus, but an examination with the Spitzer Space Telescope shows no indication of activity. The supermassive black hole at the core has an estimated mass equal to 24 million times the mass of the Sun.".
- Messier_108 thumbnail Messier_108_Hubble_WikiSky.jpg?width=300.
- Messier_108 wikiPageExternalLink m108.html.
- Messier_108 wikiPageID "975035".
- Messier_108 wikiPageRevisionID "600015961".
- Messier_108 appmagV "10.7".
- Messier_108 caption "A Hubble Space Telescope image of M108.".
- Messier_108 constellationName Ursa_Major.
- Messier_108 credit NASA.
- Messier_108 credit SKY-MAP.ORG.
- Messier_108 credit Space_Telescope_Science_Institute.
- Messier_108 distLy "14.1".
- Messier_108 epoch Epoch_(astronomy).
- Messier_108 hasPhotoCollection Messier_108.
- Messier_108 name "Messier 108".
- Messier_108 names "NGC 3556, PGC 34030, UGC 6225".
- Messier_108 sizeV "8".
- Messier_108 type "SBcd".
- Messier_108 z "699".
- Messier_108 subject Category:Barred_spiral_galaxies.
- Messier_108 subject Category:Messier_objects.
- Messier_108 subject Category:NGC_objects.
- Messier_108 subject Category:Objects_within_100_Mly_of_Earth.
- Messier_108 subject Category:PGC_objects.
- Messier_108 subject Category:Spiral_galaxies.
- Messier_108 subject Category:UGC_objects.
- Messier_108 subject Category:Ursa_Major_(constellation).
- Messier_108 type CelestialBody.
- Messier_108 type Galaxy.
- Messier_108 type PhysicalBody.
- Messier_108 comment "Messier 108 (also known as NGC 3556) is a barred spiral galaxy in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 or 1782. From the perspective of the Earth, this galaxy is seen almost edge-on.This galaxy is an isolated member of the Ursa Major Cluster of galaxies in the Virgo supercluster. It has a morphological classification of type SBbc in the de Vaucouleurs system, which means it is a barred spiral galaxy with somewhat loosely wound arms.".
- Messier_108 label "Galaxia espiral M108".
- Messier_108 label "M 108 (галактика)".
- Messier_108 label "M108 (天体)".
- Messier_108 label "M108".
- Messier_108 label "M108".
- Messier_108 label "M108".
- Messier_108 label "Messier 108".
- Messier_108 label "Messier 108".
- Messier_108 label "Messier 108".
- Messier_108 label "Messier 108".
- Messier_108 label "Messier 108".
- Messier_108 label "مسييه 108".
- Messier_108 sameAs Messier_108.
- Messier_108 sameAs Messier_108.
- Messier_108 sameAs Μεσιέ_108.
- Messier_108 sameAs Galaxia_espiral_M108.
- Messier_108 sameAs M108.
- Messier_108 sameAs M108.
- Messier_108 sameAs M108_(天体).
- Messier_108 sameAs 메시에_108.
- Messier_108 sameAs Messier_108.
- Messier_108 sameAs Messier_108.
- Messier_108 sameAs Messier_108.
- Messier_108 sameAs m.03vvrv.
- Messier_108 sameAs Q4751.
- Messier_108 sameAs Q4751.
- Messier_108 wasDerivedFrom Messier_108?oldid=600015961.
- Messier_108 depiction Messier_108_Hubble_WikiSky.jpg.
- Messier_108 isPrimaryTopicOf Messier_108.
- Messier_108 name "Messier 108".
- Messier_108 name "NGC 3556, PGC 34030, UGC 6225".