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Astronomical objects or celestial objects are naturally occurring physical entities, associations or structures that current science has demonstrated to exist in the observable universe.[1] 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.[2] 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.[3] Galaxies and dwarf galaxies have a variety of morphologies, with the shapes determined by their formation and evolutionary histories, including interaction with other galaxies.[4] 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.[5] 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), which is 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.[6] 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.
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The table below lists the general categories of objects by their location or structure.
Solar System | Extrasolar objects | ||
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Simple objects | Compound objects | Extended objects | |
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Wikimedia Commons has media related to: Astronomical objects |
The following fictional celestial bodies figure prominently in the Cthulhu Mythos stories of H. P. Lovecraft and other writers. Many of these astronomical bodies have parallels in the real universe, but are often renamed in the mythos and given fictitious characteristics. In addition to the celestial places created by Lovecraft, the mythos draws from a number of other sources, including the works of August Derleth, Ramsey Campbell, Lin Carter, Brian Lumley, and Clark Ashton Smith.
Overview:
A planet that revolves around seven stars beyond Xoth. It is inhabited by metallic brains, wise with the ultimate secrets of the universe. According to Friedrich von Junzt's Unaussprechlichen Kulten, Nyarlathotep dwells or is imprisoned on this world (though other legends differ in this regard).
(KudliÉ,P.Kašpar/KudliÉ)
When the clouds throw the moon into the shade
I am sullen
A new star will come from the space to us
I feel it deep in me
Our destiny is written in the sky
by the fire
And the ancient empires will fall.
I see again
the celestial bodies over me
they watch my way
... I wanna break them.
When creed is lie and hope is dead
false desire
I hear the mourning hymn in air
my scream in frozen ice
Our destiny is written in the sky
by the fire
And the ancient empires will fall.
Hypocrisy never hides
Rebellion in my heart
I won't kneel in front of you
I only wanna break your rules
Rebellion sets me free
Submission is lie !!!
Don't creep
Refuse
Rebellion breaks the rules
I'll find
a new place...
escape from disgrace
I won't kneel
I won't pray
I scream...struggle with me !