10- Astronomical or celestial objects
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Astronomical objects are significant physical entities, associations or structures which current science has confirmed to exist in outer space. This does not necessarily mean that more current science will not disprove their existence. Some astronomical objects, such as Themis and Neit 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. Astronomical objects thought to exist based on indirect 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. On the other hand, an astronomical object could be an asteroid belt. 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
- Sun
- Planetary system

1- Planets
- Mercury
- Venus
- Earth, Moon and 3753 Cruithne
- Mars andsatellites
- Jupiter and satellites
- Saturn and satellites
- Uranus and satellites
- Neptune and satellites

2- Dwarf planets
- Pluto and satellites
- Eris and Dysnomia
- Ceres
- Makemake
-Haumea and satellites

3- Asteroids
-Vulcanoids"
- Apoheles"
- Near-Earth asteroids, Arjunas, Atens, Apollos and Amors
- Mars-crossers
- Asteroid belt, Hungarias, Phocaeas, Nysas, Alindas, Hildas, Pallas, Marias, Koronis, Eos, Themis, Griquas, Cybeles, Thule and Vesta
- Trojan asteroids, Mars trojans, Jupiter trojans, Neptune trojans
- Outer planet crossers
- Damocloids
- Centaurs
- Trans-Neptunian objects
Kuiper Belt, Plutinos, Cubewanos andTwotinos
- Scattered Disk Objects and Sedna
- Comets
- Oort cloud
- Meteoroids, Meteors and Meteor showers

Extrasolar objects
Simple objects Compound objects Extended objects

1- Exoplanets
- Hot Jupiters
- Eccentric Jupiters
- Pulsar planets
- Hot Neptunes / Super-Earths
- Transiting planets
- Rogue / Interstellar planets
- Hypothetical planet types, Chthonian planets, Ocean planets and Trojan planets

2- Brown dwarfs
- L-type star
- T-type star
- Sub-brown dwarfs

3-Stars by spectral type
- Blue stars
- Blue-white stars
- White stars
- Yellow-white stars
- Yellow stars
- Orange stars
- Red stars
- Peculiar stars, Carbon stars, S-type stars, Shell stars, Wolf-Rayet stars, Peculiar A-type stars, Metallic A-type stars, Barium stars, P Cygni stars and Blue stragglers

4- Stars by luminosity class
- Subdwarf stars
- Dwarf (Main sequence) stars
- Subgiant stars
- Giant stars
- Bright giant stars
- Supergiant stars
- Hypergiant stars

5- Stars by population
- Population III stars
- Population II stars, Halo stars and Thick disk stars
- Population I stars

6- 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

7- 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

8- Eruptive variables
- Flare stars
- T Tauri variables
- FU Orionis variables
- R Coronae Borealis variables
- Luminous blue variables

9-Cataclysmic variables
- Symbiotic variables
- Dwarf novae
- Novae
- Supernovae, Type I supernovae and Type II supernovae
- Hypothetical and Collapsars or Hypernovae

10-Extrinsic variables
- Rotating variables, Alpha2 CVn stars and Rotating ellipsoidal variables
- Eclipsing binaries, Algol stars, Algol, Beta Lyrae stars and W Ursae Majoris stars

11-Compact stars
- White dwarfs and Black dwarfs
- Neutron stars, Magnetars and Pulsars
- Hypothetical stars, Quark stars and Preon stars
- Black holes, Intermediate-mass black holes and Supermassive black holes

12- 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 and Unresolved binaries
- X-ray 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
- Brightest cluster galaxies
- Giant ellipticals
- Dwarf galaxies

Active galaxies
- Quasars and Blazars
- Radio galaxies
- Seyfert galaxies
- Starburst galaxies

Dark galaxies

Galaxy groups

Galaxy clusters

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

Domaine Wall