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- Hercules_(dwarf_galaxy) abstract "Hercules, or Her, is a dwarf spheroidal galaxy situated in the Hercules constellation and discovered in 2006 in data obtained by the Sloan Digital Sky Survey. The galaxy is located at a distance of about 140 kpc from the Sun and moves away from the Sun with a velocity of about 45 km/s. It is classified as a dwarf spheroidal galaxy (dSph). Her has a noticeably elongated (ratio of axes ~ 3:1) shape with a half-light radius of about 350 pc. This elongation may be caused by tidal forces acting from the Milky Way galaxy, meaning that Her is being tidally disrupted now. Her also shows some gradient of velocities across the galaxy's body and is embedded into a faint stellar stream, which also points towards its ongoing tidal disruption.Her is one of the smallest and faintest satellites of the Milky Way—its integrated luminosity is about 30,000 times that of the Sun (absolute visible magnitude of about −6.6), which is comparable to the luminosity of a typical globular cluster. However, its total mass is about 7 million solar masses, which means the galaxy's mass to light ratio is around 330. A high mass to light ratio implies that Her is dominated by dark matter.The stellar population of Her consists mainly of old stars formed more than 12 billion years ago. The metallicity of these old stars is also very low at [Fe/H] ≈ −2.58 ± 0.51, which means that they contain 400 times less heavy elements than the Sun. The stars of Her were probably among the first stars to form in the Universe. Currently there is no star formation in Her. Measurements have so far failed to detect neutral hydrogen in it—the upper limit is 466 solar masses.".
- Hercules_(dwarf_galaxy) thumbnail Hercules_Dwarf_Galaxy.jpg?width=300.
- Hercules_(dwarf_galaxy) wikiPageID "26293785".
- Hercules_(dwarf_galaxy) wikiPageRevisionID "587100881".
- Hercules_(dwarf_galaxy) appmagV "14.7".
- Hercules_(dwarf_galaxy) caption "Hercules has an elongated shape.".
- Hercules_(dwarf_galaxy) constellationName Hercules_(constellation).
- Hercules_(dwarf_galaxy) distLy "430".
- Hercules_(dwarf_galaxy) distLy "479".
- Hercules_(dwarf_galaxy) epoch Epoch_(astronomy).
- Hercules_(dwarf_galaxy) hasPhotoCollection Hercules_(dwarf_galaxy).
- Hercules_(dwarf_galaxy) name "Hercules Dwarf Galaxy".
- Hercules_(dwarf_galaxy) names "Her".
- Hercules_(dwarf_galaxy) sizeV "16.8".
- Hercules_(dwarf_galaxy) type "dSph".
- Hercules_(dwarf_galaxy) subject Category:Dwarf_spheroidal_galaxies.
- Hercules_(dwarf_galaxy) subject Category:Hercules_(constellation).
- Hercules_(dwarf_galaxy) subject Category:Local_Group.
- Hercules_(dwarf_galaxy) subject Category:Milky_Way_Subgroup.
- Hercules_(dwarf_galaxy) subject Category:Objects_within_1_Mly_of_Earth.
- Hercules_(dwarf_galaxy) type Abstraction100002137.
- Hercules_(dwarf_galaxy) type Collection107951464.
- Hercules_(dwarf_galaxy) type DwarfSpheroidalGalaxies.
- Hercules_(dwarf_galaxy) type Galaxy108270938.
- Hercules_(dwarf_galaxy) type Group100031264.
- Hercules_(dwarf_galaxy) type CelestialBody.
- Hercules_(dwarf_galaxy) type Galaxy.
- Hercules_(dwarf_galaxy) type PhysicalBody.
- Hercules_(dwarf_galaxy) comment "Hercules, or Her, is a dwarf spheroidal galaxy situated in the Hercules constellation and discovered in 2006 in data obtained by the Sloan Digital Sky Survey. The galaxy is located at a distance of about 140 kpc from the Sun and moves away from the Sun with a velocity of about 45 km/s. It is classified as a dwarf spheroidal galaxy (dSph). Her has a noticeably elongated (ratio of axes ~ 3:1) shape with a half-light radius of about 350 pc.".
- Hercules_(dwarf_galaxy) label "Hercule (galaxie naine)".
- Hercules_(dwarf_galaxy) label "Hercules (dwarf galaxy)".
- Hercules_(dwarf_galaxy) label "Hercules-Zwerggalaxie".
- Hercules_(dwarf_galaxy) label "Karzeł Herkulesa".
- Hercules_(dwarf_galaxy) label "Геркулес (карликовая галактика)".
- Hercules_(dwarf_galaxy) label "ヘルクレス座矮小銀河".
- Hercules_(dwarf_galaxy) sameAs Hercules-Zwerggalaxie.
- Hercules_(dwarf_galaxy) sameAs Hercule_(galaxie_naine).
- Hercules_(dwarf_galaxy) sameAs ヘルクレス座矮小銀河.
- Hercules_(dwarf_galaxy) sameAs Karzeł_Herkulesa.
- Hercules_(dwarf_galaxy) sameAs m.0b73_9t.
- Hercules_(dwarf_galaxy) sameAs Q35750.
- Hercules_(dwarf_galaxy) sameAs Q35750.
- Hercules_(dwarf_galaxy) sameAs Hercules_(dwarf_galaxy).
- Hercules_(dwarf_galaxy) wasDerivedFrom Hercules_(dwarf_galaxy)?oldid=587100881.
- Hercules_(dwarf_galaxy) depiction Hercules_Dwarf_Galaxy.jpg.
- Hercules_(dwarf_galaxy) isPrimaryTopicOf Hercules_(dwarf_galaxy).
- Hercules_(dwarf_galaxy) name "Her".
- Hercules_(dwarf_galaxy) name "Hercules Dwarf Galaxy".