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ASTRONOMICAL OBJECT

'Astronomical objects' are significant physical entities, associations or structures which current science has confirmed to exist in space. This does not necessarily mean that more current science will not disprove their existence. Some astronomical objects, such as Themis and Neith are, in light of more recent findings, considered not to exist at all. Others, like Pluto and Ceres, prove to be of an entirely different nature than first expected. In these cases, the scientific community must come to a consensus as to the new status of these objects. Obviously, not all scientists will agree; this gives birth to fringe science. However, fringe science is not always bad science. Some of our most fundamental scientific theories, such as the superstring theory and plate tectonics, were once considered fringe. Even in the mainstream community, new ideas are constantly changing the way we view the universe at large. Astronomical objects thought to exist based on scientific evidence are considered hypothetical..
Astronomical objects can be easily confused with "'astronomical bodies'". The term "body" indicates a simple object, such as a planet. These terms differ from "'celestial objects'" and "'celestial bodies'" only in that the latter terms do not include the Earth. The table below lists the general categories of objects by their location or structure.
Solar system Extrasolar objects
Simple objects Compound objects Extended objects

Sun
Planetary system

Planets


Mercury


Venus


Earth



Moon


Mars



satellites


Jupiter



satellites


Saturn



satellites


Uranus



satellites


Neptune



satellites

Dwarf planets


Pluto



satellites


Eris



Dysnomia


Ceres

Asteroids


★ "Vulcanoids"


★ "Apoheles"


Near-Earth asteroids



★ "Arjunas"



Atens



Apollos



Amors


Mars-crossers


Asteroid belt



Hungarias



Phocaeas



Nysas



Alindas



Hildas



Pallas



Marias



Koronis



Eos



Themis



Griquas



Cybeles



Thule


Trojan asteroids



Mars trojans



Jupiter trojans



Neptune trojans


Outer planet crossers


Damocloids


Centaurs

Trans-Neptunian objects


Kuiper Belt



Plutinos



Cubewanos



Twotinos


Scattered Disk Objects



Sedna

Comets

Oort cloud

Meteoroids


Meteors


Meteor showers

Exoplanets

Hot Jupiters

Eccentric Jupiters

Pulsar planets

Hot Neptunes / Super-Earths

Transiting planets

Rogue / Interstellar planets

★ Hypothetical planet types


Chthonian planets


Oceanic planets


Trojan planets
Brown dwarfs

Lithium dwarfs

Methane dwarfs

Sub-brown dwarfs
Stars by spectral type















Peculiar stars


Carbon stars



C-type stars



S-type stars


Shell stars


Wolf-Rayet stars


Peculiar A-type stars


Metallic A-type stars


Barium stars


P Cygni stars


Blue stragglers
Stars by luminosity class

Subdwarf stars

Dwarf (Main sequence) stars

Subgiant stars

Giant stars

Bright giant stars

Supergiant stars

Hypergiant stars
Stars by population

Population III stars

Population II stars


Halo stars


Thick disk stars

Population I stars
Stars by stellar evolution

Protostars

Young stellar objects

Main sequence stars

Red giant stars

Red supergiant stars

Blue supergiant stars

Wolf-Rayet stars

White dwarf stars

Neutron stars
Variable stars

★ Intrinsic variables


Pulsating variables



Cepheid variables



W Virginis variables



Delta Scuti variables



RR Lyrae variables



Mira variables



Semiregular variables



Irregular variables



Beta Cephei variables



Alpha Cygni variables



RV Tauri variables


Eruptive variables



Flare stars



T Tauri variables



FU Orionis variables



R Coronae Borealis variables



Luminous blue variables


Cataclysmic variables



Symbiotic variables



Dwarf novae



Novae



Supernovae




Type I supernovae




Type II supernovae



★ Hypothetical




Collapsars or Hypernovae

★ Extrinsic variables


Rotating variables



Alpha2 CVn stars



Rotating ellipsoidal variables


Eclipsing binaries



Algol stars, Algol



Beta Lyrae stars



W Ursae Majoris stars
Compact stars

White dwarfs


Black dwarfs

Neutron stars


Magnetars


Pulsars

★ Hypothetical stars


Quark stars


Preon stars

Black holes


Intermediate-mass black holes


Supermassive black holes
Gamma ray bursts

Planetary systems
Star systems

Single star systems


Solar system

Multiple star systems


Binary stars



Optical binaries



Visual binaries



Astrometric binaries



Spectroscopic binaries



Eclipsing binaries



★ Close binaries




Detached binaries




Semidetached binaries




Contact binaries




Unresolved binaries



X-ray bursters


Triple star systems
★ Stellar groupings

Star clusters


Stellar associations


Open clusters


Globular clusters

Constellations

Asterisms
Galaxy components

Galactic bulges


Galactic bars

Galactic rings

Spiral arms

Thin disks

Thick disks

Galactic halos

Galactic coronae
Galaxies

Galaxies by morphology


Spiral galaxies


Barred spiral galaxies


Lenticular galaxies


Elliptical galaxies


Ring galaxies


Irregular galaxies

Galaxies by size


Giant diffuse galaxies


Giant ellipticals


Dwarf galaxies

Active galaxies


Quasars



Blazars


Radio galaxies


Seyfert galaxies


Starburst galaxies

Dark galaxies
Galaxy clusters
Galaxy cluster clouds
Superclusters
Filaments / Voids

Circumstellar matter

Debris disks

Interplanetary medium

Protoplanetary disks
Interstellar medium
Nebulae

Emission nebulae


Planetary nebulae


Supernova remnants


Plerions


H II regions

Reflection nebulae

Dark nebulae


Molecular clouds


Bok globules


Proplyds

H I regions
Intergalactic medium
Cosmic microwave background radiation
Dark matter

MACHOs

WIMPs
★ Hypothetical

Cosmic string

Domain wall


Contents
See also

See also



List of solar system objects

Lists of astronomical objects

List of light sources

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