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- Astronomical_object abstract "Astronomical objects or celestial objects are naturally occurring physical entities, associations or structures that current science has demonstrated to exist in the observable universe. The term astronomical object is sometimes used interchangeably with astronomical body. Typically, an astronomical (celestial) body refers to a single, cohesive structure that is bound together by gravity (and sometimes by electromagnetism). Examples include the asteroids, moons, planets and the stars. Astronomical objects are gravitationally bound structures that are associated with a position in space, but may consist of multiple independent astronomical bodies or objects. These objects range from single planets to star clusters, nebulae or entire galaxies. A comet may be described as a body, in reference to the frozen nucleus of ice and dust, or as an object, when describing the nucleus with its diffuse coma and tail.The universe can be viewed as having a hierarchical structure. At the largest scales, the fundamental component of assembly is the galaxy, which are assembled out of dwarf galaxies. The galaxies are organized into groups and clusters, often within larger superclusters, that are strung along great filaments between nearly empty voids, forming a web that spans the observable universe. Galaxies and dwarf galaxies have a variety of morphologies, with the shapes determined by their formation and evolutionary histories, including interaction with other galaxies. Depending on the category, a galaxy may have one or more distinct features, such as spiral arms, a halo and a nucleus. At the core, most galaxies have a supermassive black hole, which may result in an active galactic nucleus. Galaxies can also have satellites in the form of dwarf galaxies and globular clusters.The constituents of a galaxy are formed out of gaseous matter that assembles through gravitational self-attraction in a hierarchical manner. At this level, the resulting fundamental components are the stars, which are typically assembled in clusters from the various condensing nebulae. The great variety of stellar forms are determined almost entirely by the mass, composition and evolutionary state of these stars. Stars may be found in multi-star systems that orbit about each other in a hierarchical organization. A planetary system and various minor objects such as asteroids, comets and debris, can form in a hierarchical process of accretion from the protoplanetary disks that surrounds newly created stars.The various distinctive types of stars are shown by the Hertzsprung–Russell diagram (H–R diagram)—a plot of absolute stellar luminosity versus surface temperature. Each star follows an evolutionary track across this diagram. If this track takes the star through a region containing an intrinsic variable type, then its physical properties can cause it to become a variable star. An example of this is the instability strip, a region of the H-R diagram that includes Delta Scuti, RR Lyrae and Cepheid variables. Depending on the initial mass of the star and the presence or absence of a companion, a star may spend the last part of its life as a compact object; either a white dwarf, neutron star, or black hole.".
- Astronomical_object thumbnail Three_Planets_Dance_Over_La_Silla.jpg?width=300.
- Astronomical_object wikiPageExternalLink monthly.
- Astronomical_object wikiPageExternalLink http://skyandtelescope.com/observing/skychart/#.
- Astronomical_object wikiPageID "206542".
- Astronomical_object wikiPageRevisionID "605345237".
- Astronomical_object hasPhotoCollection Astronomical_object.
- Astronomical_object subject Category:Astronomical_objects.
- Astronomical_object type AstronomicalObjects.
- Astronomical_object type Object100002684.
- Astronomical_object type PhysicalEntity100001930.
- Astronomical_object comment "Astronomical objects or celestial objects are naturally occurring physical entities, associations or structures that current science has demonstrated to exist in the observable universe. The term astronomical object is sometimes used interchangeably with astronomical body. Typically, an astronomical (celestial) body refers to a single, cohesive structure that is bound together by gravity (and sometimes by electromagnetism). Examples include the asteroids, moons, planets and the stars.".
- Astronomical_object label "Astronomical object".
- Astronomical_object label "Astronomisches Objekt".
- Astronomical_object label "Ciało niebieskie".
- Astronomical_object label "Corpo celeste".
- Astronomical_object label "Hemellichaam".
- Astronomical_object label "Objet céleste".
- Astronomical_object label "Objeto astronómico".
- Astronomical_object label "Oggetto celeste".
- Astronomical_object label "Астрономический объект".
- Astronomical_object label "جرم سماوي".
- Astronomical_object label "天体".
- Astronomical_object label "天体列表".
- Astronomical_object sameAs Astronomický_objekt.
- Astronomical_object sameAs Astronomisches_Objekt.
- Astronomical_object sameAs Ουράνιο_σώμα.
- Astronomical_object sameAs Objeto_astronómico.
- Astronomical_object sameAs Argizagi.
- Astronomical_object sameAs Objet_céleste.
- Astronomical_object sameAs Oggetto_celeste.
- Astronomical_object sameAs 天体.
- Astronomical_object sameAs 천체.
- Astronomical_object sameAs Hemellichaam.
- Astronomical_object sameAs Ciało_niebieskie.
- Astronomical_object sameAs Corpo_celeste.
- Astronomical_object sameAs m.01d9ll.
- Astronomical_object sameAs Q6999.
- Astronomical_object sameAs Q6999.
- Astronomical_object sameAs Astronomical_object.
- Astronomical_object wasDerivedFrom Astronomical_object?oldid=605345237.
- Astronomical_object depiction Three_Planets_Dance_Over_La_Silla.jpg.
- Astronomical_object isPrimaryTopicOf Astronomical_object.