Sections

Catalogues

Tools and Links

Concepts

Index

Messier objects within the Virgo Cluster

Relative Galactic Position of the Northern Celestial Pole

Relative Galactic Position of the Solar System

A
	A-type Stars	Apollo Group	Arm, Sagittarius
	Abbreviations	Apparent Magnitude	Arm, Scutum-Crux
	Abell 1656	Arcturian Stars	Arm, Spiral
	Absolute Magnitude	Area, Angular	Asterism
	Absolute Temperature	Aries, First Point of	Asteroid
	Absorption Nebula	Arm, Galactic	Asteroid Belt
	Angular Area	Arm, Orion	Astronomical Unit
	Aphelion	Arm, Outer	AU
	Apoapsis	Arm, Perseus	Autumnal Equinox

B
	B-type Stars	Binary	Bright Star Catalog
	Barred Spiral Galaxy	Black Dwarf	Bright Yellow Stars
	Bayer Designation	Black Hole	Brown Dwarf
	Bayer Family	Blue Stars	BSC

C
	C-type Stars	Celestial Quadrant NQ2	Cluster, Local
	Calcium Stars	Celestial Quadrant NQ3	Cluster, Open
	Caldwell Catalogue	Celestial Quadrant NQ4	Cluster, Ursa Major
	Canes Venatici Cloud	Celestial Quadrant SQ1	Cluster, Virgo
	Canes Venatici I Group	Celestial Quadrant SQ2	Cluster of Galaxies
	Carbon Stars	Celestial Quadrant SQ3	Coma Cluster
	CBR	Celestial Quadrant SQ4	Comet
	Celestial Equator	Celestial Sphere	Constellation Family
	Celestial Meridian	Circumstellar Disc	Constellations
	Celestial Pole	Classical Kuiper Belt Object	Cosmic Background Radiation
	Celestial Pole, Northern	Cluster	Crater
	Celestial Pole, Southern	Cluster, Coma	Cubewano
	Celestial Quadrant	Cluster, Galactic	CVn I Group
	Celestial Quadrant NQ1	Cluster, Globular

D
	Dark Matter	Diameter	Drake Equation
	Dark Nebula	Disc, Circumstellar	Dwarf
	Declination	Disc, Galactic	Dwarf Planet

E
	Eccentricity	Elliptical Galaxy	Equinox, Autumnal
	Eclipse	Emission Nebula	Equinox, Vernal
	Ecliptic	Equator, Celestial	Exoplanet
	Ecliptic Pole, Northern	Equinox	Extrasolar Planet

F
	F-type Stars	First Point of Aries	Full Moon
	Family, Constellation	Flamsteed Numbers

G
	G-type Stars	Galaxies	Giant
	Galactic Arm	Galaxy, The	Globular Cluster
	Galactic Cluster	Galaxy Cluster	Gravity
	Galactic Core	Galaxy Group	Green Bank Equation
	Galactic Disc	Galilean Moons	GrG
	Galactic Nucleus	Gas Giants	Group of Galaxies
	Galactic Pole, Northern	Genitives

H
	HD Catalogue	Henry Draper Catalogue	HR Catalog
	Heavenly Waters Family	Hercules Family	Hubble Classification
	Hemisphere

I
	IC	Interstellar Medium	ISM
	Index Catalogue	Irregular Galaxy

J
	Jovian Planets

K
	K-type Stars	Kepler	Kuiper Belt, Classical Object
	Kelvin Scale	Kuiper Belt

L
	La Caille Family	Light Year	Local Group
	Lenticular Galaxy	Limb	Luminosity
	Leo I Group	Local Cluster	Lunar Seas
	Life

M
	M-type Stars	Magnitude	Meridian, Celestial
	M81 Group	Magnitude, Absolute	Messier Catalogue
	M81-M82 Group	Magnitude, Apparent	Milky Way
	M94 Group	Main Sequence Stars	Moons
	M96 Group	Maria	Multiple Stars
	Magellanic Clouds	Mass

N
	N-type Stars	Neutron Star	Northern Ecliptic Pole
	Nebula	New General Catalogue	Northern Galactic Pole
	Nebula, Absorption	New Moon	NQ1, Celestial Quadrant
	Nebula, Dark	NGC	NQ2, Celestial Quadrant
	Nebula, Emission	NGC 3031 Group	NQ3, Celestial Quadrant
	Nebula, Planetary	NGC 4736 Group	NQ4, Celestial Quadrant
	Nebula, Reflection	North Polar Sequence	Nubeculae Magellani
	NEP	Northern Celestial Pole

O
	O-type Stars	Orbital Eccentricity	Orion Family
	Open Cluster	Orbital Period	Orange Stars
	Optical Double	Orion Arm	Outer Arm
	Orbit

P
	Pale Yellow Stars	Perseus Family	Precession
	Parallax Second	Photosphere	Precession Circle
	Parsec	Planetary Nebula	Primary
	Periapse	Planets	Prominence
	Periapsis	Planets, Jovian	Protoplanet
	Pericentre	Planets, Terrestrial	Protostar
	Perihelion	Population I	Pulsating Variable
	Perseus Arm	Population II

Q
	Quadrangle	Quadrant NQ3	Quadrant SQ2
	Quadrant, Celestial	Quadrant NQ4	Quadrant SQ3
	Quadrant NQ1	Quadrant SQ1	Quadrant SQ4
	Quadrant NQ2

R
	R-type Stars	Reflection Nebula	Right Ascension
	RA	Retrograde	Rings
	Red Stars

S
	S-type Galaxy	Solar Nebula	SQ2, Celestial Quadrant
	S-type Stars	Solar System	SQ3, Celestial Quadrant
	S0-type Galaxy	Solar Wind	SQ4, Celestial Quadrant
	Sagittarius Arm	Solstice	Star Cluster
	Satellite	Solstice, Summer	Star-forming Region
	SB-type Galaxy	Solstice, Winter	Stars
	Schwarzchild Radius	Southern Celestial Pole	Stellar Nursery
	Scutum-Centaurus Arm	Southern Ecliptic Pole	Subdwarf
	Scutum-Crux Arm	Spectral Classification	Subgiant
	Seas, Lunar	Spiral Arm	Summer Solstice
	Semi-Major Axis	Spiral Galaxy	Sunspot
	SEP	Spring Equinox	Supergiant
	Sidereal Day	SQ1, Celestial Quadrant	Supernova
	Sidereal Period

T
	Terrestrial Planets

U
	Universe	Ursa Major Cluster	Ursa Major Family

V
	Variable Stars	Vernal Equinox	Virgo Group
	Variable Stars, Pulsating	Virgo Cluster	Virgo I

W
	W-type Stars	Winter Solstice	White Stars
	White Dwarf

Y
	Yellow Stars (G-type)	Yellow Stars (F-type)

Z
	Zodiac