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astronomical object type
Instances
Galaxy
Large gravitationally bound system of stars and interstellar matter
Plutoid
trans-Neptunian dwarf planet
Dwarf planet
Small planetary-mass object
Trans-Neptunian object
Solar system objects beyond Neptune
Plutino
In astronomy, a dynamical group of trans-Neptunian objects
Dwarf galaxy
Small galaxy composed of up to several billion stars
Resonant trans-Neptunian object
Trans-Neptunian object in a mean-motion orbital resonance with Neptune
List of minor-planet groups
Galaxy group
Aggregation of galaxies with 50 or fewer members
Galaxy groups and clusters
Largest known gravitationally bound object in universe; aggregation of galaxies
Galaxy filament
Largest structures in the universe, made of galaxies
planetary moon
natural satellite orbiting a planetary object
Planetary-mass moon
Planetary-mass bodies that are also natural satellites
Regular moon
Satellites that formed around their parent planet
Star
Large self-illuminated object in space
Supercluster
Large group of smaller galaxy clusters or galaxy groups
Terrestrial planet
Planet that is composed primarily of silicate rocks or metals
Inner planet
Mercury, Venus, Earth, and Mars
Interstellar cloud
Accumulation of gas, plasma, and dust in space
Galaxy cluster
Structure made up of a gravitationally-bound aggregation of hundreds of galaxies
gravitationally bound system
type of astronomical objects
Planet
Large, round non-stellar astronomical object
Planetary system
Set of non-stellar objects in orbit around a star
Barred spiral galaxy
Spiral galaxy with a central bar-shaped structure composed of stars
Spiral galaxy
Class of galaxy that has spiral structures extending from their cores.
Superior planet
planet in the Solar System beyond the orbit of the Earth
Substellar object
Astronomical object without the mass to sustain hydrogen fusion
Gas giant
Giant planet mainly composed of light elements
Small Solar System body
Object in the Solar System
astronomical object in the Solar System
type of astronomical object within the Solar System