IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
21-cm line	53 Persei star	Abell cluster
aberration	ablation	abnormal spectrum
absolute magnitude	absolute temperature scale	absorption
absorption coefficient	absorption line	absorption line system
absorption spectroscopy	absorption spectrum	abundance
abundance ratio	acceleration	accretion
accretion disk	achondrite	acoustics
acoustic wave	actinium	active galactic nucleus
active galaxy	active optics	active prominence
active region	active star	active Sun
activity index	adaption	adaptive optics
adiabatic process	adjustment	adsorption
A dwarf	aerolite	aeronomy
Ae star	afterglow	age
A giant	air	air conditioning
airglow	airplane-borne instrument	air pollution
Airy disk	albedo	Alfven surface
Alfven wave	Algol variable star	alignment optics
all-sky camera	all-sky photography	almanac
alpha2 Canum Venaticorum star	alpha particle	altazimuth mounting
altimeter	altimetry	altitude angle
aluminizing	aluminum	aluminum coating
amateur astronomy	AM Canum Venaticorum star	americium
AM Herculis star	ammonia	Amor group
amplifier	amplitude	Am star
analog recorder	analysis	anemometer
angular diameter	angular momentum	angular resolution
angular separation	angular velocity	anisotropy
annual equation	annual parallax	annular eclipse
anomalistic month	anomalistic year	anomaly
ansa	antapex	antarctic observatory
antenna	antenna design	anthropic principle
antimatter	antimony	antineutrino
antinode	antinucleon	antiparticle
antiproton	antireflection coating	apastron
aperiodic comet	aperture	aperture synthesis
apex	aphelion	apocenter
apodization	apogee	Apollo group
apparent intensity	apparent magnitude	apparent position
apparent superluminal motion	apsidal motion	apsis
Ap star	arc	archaeoastronomy
argon	armillary sphere	array
array processor	arsenic	artificial satellite
ascending node	ashen light	A star
astatine	asteroid	asteroid belt
asteroid occultation	asteroseismology	astigmatism
astrobiology	astrodynamics	astrograph
astrographic camera	astrographic catalog	astrolabe
astrology	astrometric binary star	astrometric instrument
astrometry	astronomer	astronomical constant
astronomical geodesy	astronomical optics	astronomical research
astronomical technique	Astronomical Unit	astronomy
astrophysics	A subdwarf	A subgiant
A supergiant	asymptotic giant branch	ataxite
atlas	atmosphere	atmospheric density
atmospheric extinction	atmospheric radiation	atmospheric refraction
atmospheric scattering	atmospheric scintillation	atmospheric tide
atmospheric window	atom	atomic clock
atomic line	atomic physics	atomic process
atomic spectrum	atomic time	attenuation
aurora	auroral arc	auroral jet
australite	auto-correlation	autoguider
automated telescope	automatic patrol telescope	autumnal equinox
auxiliary instrument	avalanche photodiode	axial ratio
axion	axis	azimuth
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Baade-Wesselink method	background	background noise
background radiation	Bailey type	bailys bead
Baker-Nunn camera	balloon-borne instrument	Balmer continuum
Balmer limit	Balmer series	barium
barium star	barometer	barred spiral galaxy
baryon	baryonic Dark Matter	basin
B band	B dwarf	beam switching
beam waveguide	beamwidth	bediasite
berkelium	beryllium	Besselian epoch
Bessel photometry	Be star	beta Cephei star
beta Lyrae star	B galaxy	B giant
Bianchi cosmology	bias calibration	Big Bang theory
binary pulsar	binary star	binary system
biology	bipolar galaxy	bipolar group
bipolar nebula	bipolar outflow	birth rate
bismuth	black body radiation	black dwarf
black hole	blank field	blazar
Blazhko effect	BL Herculis star	blink comparator
blinking	BL Lacertae object	blue galaxy
blue loop	blue object	blueshift
blue straggler star	B magnitude	Bodes law
bohrium	Bok globule	bolide
bolometer	bolometric correction	boron
Bose-Einstein nucleus	Bose-Einstein statistics	boson
boundary layer	bound-free transition	Bouwers telescope
bow shock	Bp star	Brackett series
bremsstrahlung	bridge	bright galaxy
bright nebula	brightness	brightness distribution
brightness temperature	bright point	bright star
brillouin scattering	brillouin spectrum	broad band photometry
bromine	brown dwarf	B star
B subdwarf	B supergiant	bubble
bulge	Burkert profile	burst
burster	butterfly diagram	BV photometry
Bw star	BY Draconis star
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
cadmium	caesium	Ca II emission line
calcium	calcium line	calendar
calibration	californium	camera
camera lens	canyon	Cape photometry
Cape RI photometry	capture	carbonaceous chondrite
carbon burning	carbon	carbon compound
carbon dioxide	carbon disulfide	carbon flash
carbon line	carbon monosulfide	carbon monoxide
carbon nitrogen cycle	carbon star	Cassegrain antenna
Cassegrain focus	Cassegrain telescope	cataclysmic variable star
catadioptric system	catalog	catastrophe theory
cathode	catoptric system	caustic
caustic crossing	CCD detector	CCD observation
CCD photometry	cD galaxy	celestial coordinate system
celestial equator	celestial mechanics	celestial pole
celestial sphere	celsius temperature scale	center
center of mass	central star	centrifugal force
centripetal force	Cepheid	Cepheid distance
Cerenkov counter	Cerenkov radiation	Ceres
cerium	Chandler wobble	Chandrasekhar mass
Chandrasekhar-Schoenberg limit	charge-coupled device	charge-injection device
charge-transfer device	chemical composition	chemical element
chemical evolution	chemiluminescence	chemistry
chlorine	chondrite	chondrules
chromatic aberration	chromium	chromosphere
chronometer	CH star	C I emission
C II region	circular orbit	circular polarization
circumplanetary matter	circumstellar disk	circumstellar dust
circumstellar envelope	circumstellar gas	circumstellar grain
circumstellar matter	circumstellar shell	civil time
classical nova	classical T Tauri star	classification
clean method	clock	close binary star
closed universe	close encounter	cloud
cloud monitor	clumping	cluster
clustering	CNO anomaly	CN star
coating	cobalt	cocoon star
coelostat	coherence	cold Dark Matter
collapse	collapsed star	collapsing cloud
collimation	collimator	collisional excitation
collisional plasma	collision broadening	collision
collision process	collision spectroscopy	collision strength
color	color equation	color excess
colorimetry	color index	color-luminosity relation
color-magnitude relation	color photography	color-redshift relation
color vision	coma	comatic aberration
cometary globule	comet	compact galaxy
compact H II region	compact nebula	compact nucleus
compact object	compact source	companion galaxy
companion star	comparison	comparison lamp
comparison star	component	composite particle
composition	Compton effect	Compton scattering
computer application	computer	computer model
computer program	computer simulation	computing
condensation	conduction	conjunction
constant	constellation	contact binary star
continental drift	continent	continuous spectrum
continuum radiation	contiuum	contour map
contraction	contrast	control system
convection	convective envelope	convective shell
convective zone	cooling	cooling flow
coordinated Universal Time	coordinate system	copper
core	corona	coronagraph
coronal dimming	coronal hole	coronal line
coronal loop	coronal mass ejection	coronal plume
coronal transient	coronal wave	corpuscular emission
correction	corrector plate	correlation
cosmic abundance	cosmic background radiation	cosmic
cosmic electrodynamics	cosmic noise	cosmic ray astronomy
cosmic ray	cosmic ray shower	cosmic ray source
cosmic string	cosmic year	cosmochemistry
cosmochronology	cosmogony	cosmological constant
cosmological distance scale	cosmological model	cosmological parameter
cosmology	Coude focus	Coude spectrograph
Coude spectrum	counter	counting
coupling	crater	cross-correlation
crustal dynamics	crust	cryogenics
cryostat	CS	curium
current	current sheet	curve of growth
cusp crossing	cusp	cyanoacetylene
cyanodiacetylene	cyanogen	cyanogen line
cyanopolyene	cycle	cyclotron radiation
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
damping constant	Danjon astrolabe	dark adaption
dark cloud	dark-current calibration	Dark Energy
Dark Matter	dark nebula	darkness
darkroom	darmtadtium	DA star
data acquisition	data analysis	database
data center	data processing	data reduction
data retrieval	data storage	DB star
DDO photometry	dead-time calibration	decay oscillation
deceleration	deceleration parameter	Declination
deconvolution	defect	deformation
degenerate dwarf	degenerate matter	degenerate star
delta delphini star	delta Scuti star	dense cloud
densitometer	densitometry	density bounded
density	density distribution	density fluctuation
density perturbation	density variation	density wave model
descending node	design	de Sitter universe
destruction	detached binary star	detection
detector array	detector	determination
deuterium	D galaxy	diagram
diameter	diamond ring effect	dichroic mirror
Dicke radiometer	differential equation	differential image motion monitor
differential rotation	diffraction	diffraction grating
diffraction patterns	diffuse nebula	diffuse radiation
diffusion	digital image	digital recorder
dimension	diode array	diode
dioptric system	dipole antenna	dipole
dirac cosmology	directional antenna	dirty snowball theory
discoloration	discoveries	discrete radio source
dish antenna	disintegration	disk
disk flaring	disk galaxy	disk population
disk star	dispersion	disruption
dissipation	distance	distance indicator
distance measurement	distance modulus	distance scale
distortion	distribution function	distribution in space
diurnal parallax	diurnal phenomena	diurnal variation
D layer	D line	dome
dome seeing	Doppler broadening	Doppler effect
DO star	double galaxy	double-mode Cepheid
double-mode pulsation	double-mode variable star	double quasar
DQ Herculis star	dredge up	drift scan
drift wave	drive	dubnium
dust cloud	dust detector	dust
dust grain	dust nebula	dust shell
dust storm	dwarf Cepheid	dwarf
dwarf galaxy	dwarf nova	dwarf planet
dynamical evolution	dynamical friction	dynamical parallax
dynamical time	dynamics	dynamo theory
dysprosium
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
early-type emission star	early-type galaxy	early-type star
early-type supergiant	early-type variable star	early universe
Earth	Earth atmosphere	Earth-Moon system
Earth orbit	earthquake	Earth rotation
Earth sciences	Earthshine	eccentric anomaly
eccentricity	echelle grating	echelle spectrograph
echelle spectrum	eclipse	eclipsing binary star
ecliptic coordinate system	ecliptic	ecliptic latitude
ecliptic longitude	ecliptic plane	ecliptic pole
E corona	Eddington limit	edge effect
Edgeworth-Kuiper belt	Edgeworth-Kuiper belt object	effective temperature
e-folding time	E galaxy	Einstein coefficient
Einstein effect	einsteinium	Einstein ring
Einstein universe	ejecta	ejection
elasticity	E layer	electrical property
electric charge	electric current	electric dipole
electric field	electricity	electrode
electrodynamics	electromagnetic	electromagnetic field
electromagnetic forces	electromagnetic interaction	electromagnetic radiation
electromagnetic theory	electron beam	electron density
electron	electronic camera	electronic equipment
electronics	electronographic camera	electron pumping
electron temperature	electrostatic wave	elementary particle
elementary particle scattering	element formation	ellipsoidal variable star
elliptical galaxy	elliptical orbit	emerging flux
emission coefficient	emission line	emission line galaxy
emission line object	emission line star	emission nebula
emission process	emission spectrum	emissivity
encounter	energetic particle	energy content
energy density	energy distribution	energy
energy level	energy source	energy spectrum
energy-transfer	engineering	English mounting
enrichment	enthalpy	entropy
envelope	Ep galaxy	ephemeral active region
ephemeris	ephemeris time	epoch
e-process	equation of state	equation of the center
equation of the equinox	equation of time	equator correction
equator determination	equator	equatorial bulge
equatorial coordinate system	equatorial mounting	equatorial zone
equator position	equilibrium	equilibrium figures
equinox correction	equinox	equinox position
equipotential surface	equivalent width	erbium
e region	ergosphere	error analysis
error	eruption	eruptive binary star
escape velocity	ethane	ethylene
europium	evaporation	event horizon
Evershed-effect	evolutionary track	evolution
evolved star	excitation	exciting star
exosphere	expanding envelope	expanding universe
expansion	explosion	exponential profile
extended object	extended source	extragalactic object
extragalactic radio source	extrasolar planet	extraterrestrial intelligence
extraterrestrial life	extreme carbon star	extreme horizontal branch star
extreme population I star	extreme ultraviolet radiation	eyepiece
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Faber-Jackson distance	Faber-Jackson relation	Fabry-Perot interferometer
Fabry-Perot spectrograph	facula	faint blue star
faint galaxy	faint star	false color photography
Fanaroff-Riley class	Faraday effect	far infrared radiation
far ultraviolet radiation	fast Fourier transform	fast nova
F corona	F dwarf	feed
feed horn	Fermi-Dirac nucleus	Fermi-Dirac statistics
Fermi interaction	fermion	fermium
Feynman diagram	Feynman integrals	F giant
fiber optics	fibrill	field corrector
field curvature	field equation	field galaxy
field of view	field star	figuring
filamentary nebula	filling factor	filter
filter wheel	finding chart	finding list
fine analysis	fine structure	fireball
fission	FK catalog system	flare
flare star	flash spectrum	flash star
flat field	flat field lamp	flattening
F layer	flexure	florine
flow	flow instability	fluctuation
fluid dynamics	fluid mechanics	fluorescence
flux density	flux	focal length
focal reducer	focus	Fokker-Planck equation
forbidden line	forbidden transition	forbush effect
force	forecasts	fork mounting
formation	Fourier analysis	Fourier component
Fourier spectrograph	Fourier transform	Fourier transform spectroscopy
fragmentation	fragment	francium
Fraunhofer line	free-bound emission	free-free emission
f region	frequency analysis	frequency distribution
frequency	frequency shift	frequency standard
friction	Friedmann universe	frozen in element
F star	F subdwarf	F subgiant
F supergiant	function	fundamental chemical element
fundamental frequency	fundamental mode	fundamental particle
fundamental plane	fundamental star	fundamental system
funneling	FU Orionis star	fusion
future light cone
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
gadolinium	Galactic	Galactic anticenter
Galactic bulge	Galactic center	Galactic cluster
Galactic coordinate system	Galactic cosmic ray	Galactic equator
Galactic halo	Galactic latitude	Galactic longitude
galactic nucleus	Galactic plane	Galactic pole
Galactic rotation	Galactic spurs	Galactic structure
Galactic window	galaxy cluster	galaxy content
galaxy count	galaxy distribution	galaxy encounter
galaxy evolution	galaxy formation	galaxy
galaxy group	galaxy merger	galaxy rotation curve
galaxy structure	galaxy void	galilean satellite
gallium	gamma Cassiopeiae star	gamma-ray astronomy
gamma-ray background	gamma-ray burst	gamma-ray line
gamma-ray observatory	gamma-ray radiation	gamma-ray scattering
gamma-ray source	gamma-ray spectrograph	gamma-ray spectroscopy
gamma-ray spectrum	gamma-ray telescope	gas cloud
gas content	gas density	gas distribution
gas dynamics	gaseous disk	gaseous nebula
gaseous sphere	gas	gas to dust ratio
G band	G dwarf	gegenschein
general theory of relativity	Geneva photometry	geocentric orbit
geocorona	geodesy	geoid
geology	geomagnetic field	geomagnetism
geophysical observatory	geophysics	geostationary satellite
germanium	German mounting	gf value
G giant	giant branch	giant branch star
giant elliptical galaxy	giant galaxy	giant
giant molecular cloud	giant planet	giant radio galaxy
glaciology	glass	glitch
global positioning system	globular star cluster	globule
Goedel universe	gold	Goulds belt
grading function	grain	granulation
granule	graph	graphite
graticule	grating response	grating ring
grating spectrograph	gravimetry	gravitating disk
gravitational collapse	gravitational constant	gravitational deflection
gravitational effect	gravitational energy	gravitational equilibrium
gravitational field	gravitational force	gravitational instability
gravitational interaction	gravitational lens	gravitational lensing
gravitational lensing shear	gravitationally lensed source	gravitational microlensing
gravitational radiation	gravitational redshift	gravitational wave
gravitation	graviton	gravity anomaly
gravity darkening	gravity	gravity wave
grazing incidence	grazing incidence spectrograph	grazing incidence telescope
Great Attractor	greenhouse effect	Gregorian calendar
Gregorian telescope	grid	grism
ground-based astronomy	G star	G subdwarf
G subgiant	G supergiant	guide system
Gunn diode	Gunn photometry	g value
gyrosynchrotron radiation
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
hadron barrier	hadron	hafnium
halation	half-wave dipole	half-wave plate
halo	halo star	H alpha
H alpha emission line star	H alpha photometry	H and K line
Hanle effect	Harman-Seaton sequence	harmonic frequency
Haro galaxy	Hartmann test	hassium
Hawking radiation	Hayashi track	H beta
H beta photometry	HD curve	H delta
head tail galaxy	heat-transfer	heavy element
heavy metal star	He I	height
He II	He III	He II ionization zone
heliocentric correction	heliocentric Julian Date	heliocentric orbit
heliocentric velocity	heliograph	heliometer
heliopause	helioseismology	heliosphere
heliostat	helium burning	helium flash
helium	helium-poor star	helium-rich star
helium shell flash	Helmholtz-Kelvin contraction	Henry Draper catalog
Henry Draper system	Henyey track	H epsilon
Herbig AeBe star	Herbig-Haro object	Hertzsprung gap
Hertzsprung-Russell diagram	Hess diagram	heterodyne
H gamma	H I	H I absorption
Hickson compact group	H I cloud	H I content
H I emission	hierarchical cosmology	high-energy astrophysics
high-energy radiation	high-luminosity star	high-mass star
high-mass X-ray binary star	high-resolution spectrosopy	high-resolution spectrum
high-speed photometer	high-state	high-temperature
high-velocity cloud	high-velocity star	H II
H II region	Hirayama family	H I region
history of astronomy	H line	H magnitude
Holmberg radius	holmium	holmium star
Holtsmark approximation	horizon coordinate system	horizon
horizontal branch star	horizontal parallax	horn antenna
horseshoe mounting	hour angle	HST photometry
Hubble classification	Hubble constant	Hubble diagram
Hubble law	Hubble radius	Hubble Sandage variable star
Hubble Space Telescope	Hubble time	hydrated carbon
hydrocarbon	hydrodynamics	hydrogen burning
hydrogen deficient star	hydrogen	hydrogen line
hydrogen spectrum	hydrostatic equilibrium	hydroxyl radical
hyperbolic orbit	hyperfine line	hypergalaxy
hypergiant	hypernova	hypothetical planet
HZ Herculis star
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
identification	I galaxy	illumination
image	image processing	image reconstruction
image tube	imaging instrument	I magnitude
impact crater	impersonal astrolabe	inclination
indium	indochinite	inertial coordinate system
inertial reference frame	inflationary universe	infrared astronomy
infrared detector	infrared emission	infrared galaxy
infrared	infrared observatory	infrared photometry
infrared radiation	infrared source	infrared telescope
infrared transmission window	inhomogenity	initial mass function
inner core	inner planet	instability
instability strip	instrumental profile	instrument
integral field spectrograph	integrated magnitude	integration time
intensity	intensity interferometer	interacting binary star
interacting galaxy	interaction	intercloud gas
intercloud matter	interference filter	interference fringe
interference noise	interference spectrosocopy	interference wave
interferometer	interferometric correlation	interferometry
intergalactic absorption	intergalactic cloud	intergalactic gas
intergalactic matter	intergalactic space	interior
intermediate population star	intermediate type star	internal motion
interplanetary dust	interplanetary gas	interplanetary grain
interplanetary magnetic field	interplanetary matter	interplanetary scintillation
interstellar absorption	interstellar bubble	interstellar communication
interstellar dust	interstellar gas	interstellar magnetic field
interstellar matter	interstellar molecule	interstellar reddening
interstellar scintillation	interstellar wind	intracluster matter
intrinsic color	intrinsic variable star	inverse Compton effect
inverse Compton scattering	inverse maser	iodine cell
iodine	ion composition	ion density
ion	ionization equilibrium	ionization
ionized gas	ionizing shock wave	ionosphere
ionospheric scintillation	ion plasma wave	ion temperature
IRAS galaxy	IRAS satellite	iridium
iron	iron meteorite	irradiance
irregular galaxy	irregular variable star	isophotal diameter
isophot	isothermal sphere	isotope
isotopic abundance	isotopic composition	isotropy
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Jansky	Jeans length	Jeans mass
jet	J magnitude	Johnson noise
Johnson photometry	Jovian planet	Julian calendar
Julian Date	Julian epoch	jump condition
Jupiter
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
kappa mechanism	Kapteyn selected area	K corona
k correction	K dwarf	Kellner eyepiece
Kelvin	Kelvin timescale	Keplerian orbit
Kerr black hole	K giant	kinematic parallax
kinematics	kinetic energy	Kirkwood gap
K line	K magnitude	Kramers opacity
Kreutz sungrazer	Kron-Cousins photometry	Kruskal diagram
krypton	K star	K subdwarf
K subgiant	K supergiant
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Lagrangian point	lambda eridani star	lamp
lanthanum	Large Magellanic Cloud	large scale structure
laser	laser ranging	late-type dwarf
late-type galaxy	late-type giant	late-type star
late-type subdwarf	late-type supergiant	late-type variable star
latitude determination	latitude	latitude variation
lawrencium	Lb variable star	Lc variable star
L dwarf	lead	Lemaitre universe
lens antenna	lens design	lens
lenticular galaxy	lepton	L galaxy
libration	life	light absorption
light coherence	light cone	light curve
light emission	light interference	light polarization
light pollution	light scattering	light year
limb brightening	limb darkening	limiting magnitude
linearity calibration	line blanketing	line blending
line blocking	line broadening	line formation
line identification	line intensitite	line of sight
line profile	line ratio	liner galaxy
line shift	line spectrum	line width
lithium	lithium-poor star	lithium star
lithosphere	L magnitude	lobe
Local Group	Local Standard of Rest	Local Supercluster
local thermodynamic equilibrium	location behind	location between
location in front	location	log g value
long baseline interferometer	long baseline interferometry	longitude
long period comet	long period variable star	long slit
long slit spectrum	loop	low-luminosity star
low-mass star	low-mass X-ray binary star	low-state
low-temperature plasma	L subdwarf	luminescence
luminosity classification	luminosity class	luminosity-dispersion relation
luminosity distribution	luminosity function	luminosity
luminous arc	luminous blue variable star	lunar dome
lunar eclipse	lunar laser ranging	lunar
lunar occultation	lunar phase	lunar theory
lutetium	Lyman alpha	Lyman alpha forest
Lyman beta	Lyman continuum	Lyman series
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
macro spicule	macroturbulence	Magellanic cloud
Magellanic stream	magnesium	magnetar
magnetic anomaly	magnetic disturbances	magnetic field
magnetic monopole	magnetic pole	magnetic property
magnetic star	magnetic storm	magnetic variable star
magnetograph	magnetoheliograph	magnetohydrodynamics
magneto-optical effect	magnetosphere	magnetospheric substorm
magnitude	main sequence	main sequence star
major axis	Maksutov telescope	manganese
manganese star	mantle	map
maria	Markarian galaxy	Mars
mascon	maser	mass density
mass distribution	mass exchange	mass flow
mass function	massive galaxy	massive object
massive star	mass-loss	mass-luminosity relation
mass	mass-radius relation	mass-ratio
mass to light ratio	mass-transfer	mathematical analysis
mathematical model	mathematics	matter
Maunder minimum	maximum entropy method	maximum
M dwarf	mean anomaly	mean equinox
mean solar time	measurement	measuring instrument
mechanical component	mechanical property	medium band photometry
megalithic astronomy	megamaser	meitnerium
mendelevium	Mercury	mercury manganese star
mercury	merger	meridian circle
meridian	meridian observation	meson
mesopause	mesosphere	Me star
metagalaxy	metal abundance	metal-deficient star
metal line	metal-poor star	metal-rich star
meteor camera	meteorite crater	meteorite impact
meteorite	meteor	meteoroid dust cloud
meteoroid	meteorology	meteor shower
meteor stream	meteor trail	methane
metonic cycle	metrology	Me variable star
M giant	Michelson interferometer	Michelson interferometry
microchannel plate	microdensitometer	microdensitometry
micrometeorite	micrometeoroid	micrometer
microphotometer	microprocessor	microturbulence
microwave antenna	microwave background	microwave emission
microwave imaging	microwave	microwave radiation
microwave spectroscopy	microwave spectrum	Mie scattering
Milky Way galaxy	millimeter astronomy	millimeter radiation
Mills cross antenna	Milne Eddington approximation	mineral deposit
mineralogy	minimum	minor axis
minor planet family	Mira variable star	mirror cell
mirror	missing mass	MK classification
M magnitude	model	MOdified Newtonian Dynamics
modulation	modulation transfer function	moldavite
molecular astrophysics	molecular band	molecular cloud
molecular hydrogen	molecular line	molecular spectroscopy
molecular spectrum	molecule	molybdenum
momentum	monochromator	Monte Carlo technique
Moon	moonquake	morphology
motion	mottle	moving cluster parallax
m region	M star	M subdwarf
M subgiant	M supergiant	multi-channel detector
multi-channel spectrograph	multi-color photometry	multi-fiber spectrograph
multi-periodic pulsation	multi-periodic variable star	multiple galaxy
multiple mirror telescope	multiple star	multi-slit spectrograph
muon
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
nadir	naked singularity	narrow band photometry
Nasmyth focus	natural line broadening	natural line width
nautical almanac	Navarro-Frenk-White profile	N-body problem
N-body simulation	nearby dwarf	nearby galaxy
nearby star	near-Earth asteroid	near infrared radiation
near ultraviolet radiation	nebula	nebular filament
negative H ion	neighborhood	neodymium
neon	Neptune	neptunium
Neumann line	neutral density filter	neutral gas
neutrino	neutron	neutron star
Newtonian focus	Newtonian gravitation	Newtonian telescope
N galaxy	nickel	night sky brightness
night vision	niobium	nitrogen
N magnitude	nobelium	noctilucent cloud
node	noise	nomenclature
non-equilibrium flow	non-LTE transfer	non-main sequence star
non-radial pulsation	non-thermal particle	non-thermal radiation
non-thermal source	North Celestial Pole	North Ecliptic Pole
northern hemisphere	North Galactic Pole	nova-like variable
nova	N star	nuclear astrophysics
nuclear fission	nuclear fusion	nuclear physics
nuclear radiation	nuclear reaction	nucleosynthesis
nucleus atom	nucleus celestial object	numerical analysis
numerical integration	numerical method	numerical simulation
nutation
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
O association	OB association	objective grating
objective	objective prism	oblateness
oblique rotator	obliquity of ecliptic	observational cosmology
observation	observatory	observing technique
OB star	OB supergiant	occultation
occulting disk	oceanography	ocean tide
O cluster	O dwarf	Oef star
Oe star	Of star	O giant
OH absorption	OH cloud	OH emission
OH IR star	OH line	OH maser
OH source	old star	O magnitude
Omega baryon	Omega Lambda	Omega mass
Omega parameter	on-line system	Oort cloud
Oort constant	Oort formulae	Oosterhoff group
opacity	open star cluster	open universe
Opik theory	opposition	optical aberration
optical burst	optical component	optical depth
optical design	optical double star	optical fiber
optical film	optical filter	optical flare
optical glass	optical identification	optical instrument
optical interferometer	optical interferometry	optical material
optical observation	optical observatory	optical outburst
optical pathlength	optical position	optical property
optical pulsar	optical radar	optical scanners
optical spectrograph	optical spectroscopy	optical surface
optical system	optical telescope	optical testing
optical transfer function	optical transmission window	optical waveguide
optical window	optics	orbital anomaly
orbital element	orbital evolution	orbital motion
orbital theory	orbital velocity	orbit determination
orbit	organic matter	organic molecule
orientation	origin	orion population star
orrery	orthohydrogen	orthoscopic eyepiece
oscillating universe	oscillation	oscillator strength
osculating orbit	osculatory element	osmium
O star	O subdwarf	O supergiant
outburst	outer planet	outgassing
overabundance	overtone frequency	overtone mode
oxygen burning	oxygen	ozone layer
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
pair annihilation	pair production	paleomagnetism
palladium	parabolic antenna	parabolic mirror
parabolic orbit	parabolic reflector	parabolic velocity
parahydrogen	parallax	parallel computer
parametric amplifier	parsec	partial eclipse
particle acceleration	particle accretion	particle beam
particle creation	particle escape	particle interaction
particle	particle production	particle propagation
Paschen-Back effect	Paschen series	past light cone
Paul trap	p branch	P Cygni line profile
peculiar galaxy	peculiar giant	peculiar motion
peculiar object	peculiar star	peculiar variable star
peculiar velocity	pencil beam	pendulum
Penrose process	penumbral filament	penumbra
periapsis	periastron	pericenter
perigee	perihelion	period-age relation
period change	period-color relation	period-density relation
period determination	periodic comet	periodic orbit
periodic variable star	period-luminosity-color relation	period-luminosity relation
period-mass relation	period	period-radius relation
period-spectrum relation	peripheral	perturbation
perturbation theory	petrology	Pfund series
PG1159 star	phase angle	phased array
phase defect	phase difference	phase effect
phase error	phase function	phase rotator
phase sensitive detector	phase shift	phase space
phase switching interferometer	phase switching	phase wave
Phillips band	phosphorescence	phosphorescent scintillation
phosphorus	photocathode	photochemistry
photoconductive cell	photodiode	photodissociation
photoelectric instrument	photoelectric magnitude	photoelectric photometer
photoelectric photometry	photoelectronic device	photogrammetry
photographic astrometry	photographic developer	photographic emulsion
photographic film	photographic filter	photographic instrument
photographic magnitude	photographic material	photographic photometry
photographic plate	photographic processing	photograph
photography	photoheliograph	photoionization
photoluminescence	photometer	photometric element
photometric parallax	photometric standard star	photometric system
photometry	photomultiplier tube	photon counting system
photon	photosphere	photovisual magnitude
photovoltaic cell	physical constant	pion
pitch angle	pixel	plage
Planck black body formula	Planck constant	plane polarization
planetarium	planetar	planetary alignment
planetary microlensing	planetary nebula	planetary
planetary ring	planetary system	planetary theory
planetesimal	planetology	planet
planet satellite	plasma cloud	plasma jet
plasma loop	plasmapause	plasma physics
plasma	plasma wave	platinum
Pluto	plutonium	P magnitude
Pogson scale	Poincare theorem	pointing accuracy
pointing error	point spread function	polar axis
polar cap	polar diagram	polarimeter
polarimetry	polarization charge separation	polarized light
polarized radiation	polar motion	polar orbit
polar region	polar tide	pole
polishing	pollution	polonium
polycyclic hydrocarbon	polytrope	population II Cepheid
population III star	population II star	population inversion
population I star	position angle	position
position sensitive proportional counter	positron	post-asymptotic giant branch
post-main sequence star	potassium	potential energy
potential theory	power	Poynting-Robertson effect
p process	praseodymium	preamplifier
precession	precision	precursor pulse
prediction	pre-Galactic star	pre-main sequence star
pre-nova	pre-solar nebula	pressure broadening
pressure	pre-supernova	primary lens
primary mirror	primary star	prime focus
primordial fireball	primordial galaxy	prism
prism spectrograph	profile	progenitor
promethium	prominence	propagation
proper motion	property	proportional counter
protactinium	protocluster	protogalaxy
proton	proton-proton reaction	protoplanetary nebula
protoplanet	protostar	pulsar
pulsating variable star	pulsation mode	pulsation
pulsation theory	pulse counter	pulse counting
pulse duration	pulse energy	pulse intensity
pulse profile	pulse	pulse structure
pulse width	pulse window	Purkinje effect
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
q branch	Q magnitude	quadrant detector
quadrant	quadrature	quanta
quantization	quantum cosmology	quantum efficiency
quantum field theory	quantum mechanics	quantum theory
quark	quarter wave plate	quasar galaxy pair
quasar microlensing	quasar	quiescent prominence
quiet Sun
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
radar astronomy	radar equipment	radar mapping
radar	radar telescope	radial pulsation
radial velocity	radiant meteor	radiant moving cluster
radiation belt	radiation damping	radiation field
radiation mechanism	radiation pressure	radiation
radiation scattering	radiative braking	radiative equilibrium
radiative recombination	radiative transfer	radical
radio absorption	radioactive decay	radioactivity
radio antenna	radio astrometry	radio astronomy
radio background	radio burst	radio core
radio emission	radio flare	radio frequency
radio galaxy	radioheliograph	radio interference
radio interferometer	radio interferometry	radio jet
radiometer	radiometry	radio observatory
radio occultation	radio pulsar	radio quiet quasar
radio radiation	radio recombination line	radio source catalog
radio source count	radio source	radio spectrograph
radio spectroscopy	radio spectrum	radio star
radio structure	radio telescope	radio transmission window
radio waveguide	radium	radius-luminosity relation
radon	RAID array	Raman effect
Raman scattering	Raman spectroscopy	Raman spectrum
Ramsden eyepiece	range finder	Rankine-Hugoniot relation
rapid burst	rapid oscillation	rare earth
R association	ratio	Rayleigh
Rayleigh criterion	Rayleigh limit	Rayleigh number
Rayleigh scattering	Rayleigh-Taylor instability	ray
Razin effect	R Canis Majoris star	R Coronae Borealis star
read out noise	real anomaly	receiver
recombination line	recombination	recurrent nova
reddened star	reddening law	reddening
red dwarf flare star	red dwarf	red giant bump
red giant clump	red giant	red giant tip
redshift distance relation	redshift magnitude relation	redshift
red star	red supergiant	reduction method
reference frame	reference system	reflecting telescope
reflection grating	reflection nebula	reflection
reflector antenna	refracting telescope	refraction angle
refraction	refractive index	regression of node
relativistic astrophysics	relativistic cosmology	relativistic disk
relativistic effect	relativistic electron	relativistic fluid dynamics
relativistic mechanics	relativistic particle	relativistic plasma
relativistic star	relativistic velocity	relativity
relaxation time	remote control system	remote sensing
research	reseaux	residual intensity
resolution	resonance gap	resonance line
retardation	reticle	reticon array
rgb photometry	RGB tip distance	rgu photometry
rhenium	rho Cassiopeiae star	rhodium
Right Ascension	rigid body rotation	rill
ring division	ring galaxy	ring nebula
ring	Ritchey-Chretien telescope	R magnitude
Roche limit	Roche lobe	rocket-borne instrument
roentgenium	Rosseland opacity	rotating body
rotating shell	rotating star	rotational velocity
rotation	r-process	RRab star
RRa star	RRb star	RRc star
RR Lyrae star	RR Telescopii star	RS Canum Venaticorum star
R star	rubidium	runaway star
ruthenium	rutherfordium	RV Tauri star
RW Aurigae star
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Saha equation	samarium	sampling
Saros cycle	satellite-borne instrument	satellite laser ranging
satellite	Saturn	SBF distance
scale height	scandium	scattering
Schmidt camera	Schmidt telescope	Schwarzschild metric
Schwarzschild radius	scientific field	scintillation counter
scintillation	S Doradus star	seaborgium
search for extraterrestrial life	seasonal phenomena	season
secondary cosmic ray	secondary mirror	secondary star
secular parallax	seeing monitor	seeing
segmented optics	seismology	selection effect
selective absorption	selenium	selenology
self-absorption	self-calibration method	semi-barium star
semiconductor device	semi-detached binary star	semimajor axis
semiminor axis	semi-regular variable star	sensitivity
sensitometer	separation	sextant
Seyfert galaxy	Seyfert nucleus	S galaxy
shadow band	shaped reflector	shell burning
shell	shell star	shepherd satellite
shock	shock wave	short period variable star
shot noise	shutter	sidelobe
sidereal time	siderostat	sigma8
signal analysis	signal detection	signal processing
signal-to-noise ratio	silicon burning	silicon monoxide
silicon	silicon star	silver coating
silver	simulation	singularity
SiO maser	site protection	site testing
sky brightness	sky noise	sky
sky survey	slit mask	Sloan photometry
slow nova	Small Magellanic Cloud	sodium
soft gamma-ray repeater	solar activity	solar atmosphere
solar constant	solar corona	solar cycle
solar day	solar eclipse	solar filament
solar interior	solar motion	solar nebula
solar neutrino problem	solar observatory	solar optical telescope
solar oscillation	solar parallax	solar physics
solar-planetary relation	solar radio telescope	solar
solar storm	solar surface	Solar System
solar telescope	solar-terrestrial relation	solar wind
solstice	sound speed	source
South Celestial Pole	South Ecliptic Pole	southern hemisphere
South Galactic Pole	space astrometry	space astronomy
space biology	space debris	space exploration
space geodesy	space law	space motion
space observatory	space pollution	space probe instrument
space probe	space research	space
space telescope	space-time curvature	space-time singularity
space vehicle	special theory of relativity	speckle interferometry
speckle	spectral band	spectral classification
spectral index	spectral line	spectral resolution
spectral type	spectrograph slit	spectrograph
spectrography	spectroheliograph	spectrophotometer
spectrophotometry	spectroscopic analysis	spectroscopic binary star
spectroscopy	spectrum	spectrum variable star
spherical aberration	spherical coordinate	SPH simulation
spicule	spiral arm	spiral galaxy
s-process	S star	stability
standard candle	standard epoch	standard star
star association	star atlas	starburst galaxy
star cluster	star count	star distribution
star formation	Stark broadening	starspot
star	statistical parallax	statistical relation
statistics	steady-state theory	stellar atmosphere
stellar black hole	stellar dynamics	stellar evolution
stellar interior	stellar motion	stellar object
stellar oscillation	stellar population	stellar ring
stellar	stellar structure	stellar wind
stimulated emission	stimulated radiation	stokes parameter
stratopause	stratosphere	streak photography
streamer	stroboscope	Stromgren photometry
Stromgren sphere	strong gravitational lensing	strong interaction
strontium star	strontium	structure
subdwarf	subgiant	subluminous star
submillimeter astronomy	submillimeter radiation	subreflector
sulfur	summer solstice	Sun
sunlight	sunspot cycle	sunspot group
sunspot number	sunspot	Sunyaev-Zeldovich effect
supercluster	superconducting tunnel junction	supergalactic coordinate system
supergalactic latitude	supergalactic longitude	supergiant
supergranulation	superhump	supermassive star
supernova envelope	supernova remnant	supernova
support system	surface brightness	surface gravity
surface of celestial body	surface photometry	surface property
survey	SU Ursae Majoris star	S Vulpeculae star
Swan band	SX Arietis star	SX Phoenicis star
symbiotic nova	symbiotic star	symbol
synchronous detector	synchronous rotation	synchrotron radiation
synodic period	system	syzygy
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
tail	tangential velocity	tantalum
t array	T association	taxonomy
T dwarf	teaching in astronomy	technetium line
technetium star	technetium	tektite
telescope array	telescope construction	telescope design
telescope instrument	telescope mirror	telescope mounting
telescope	television camera	television detector
television	telluric line	tellurium
temperature control	temperature distribution	temperature effect
temperature fluctuation	temperature scale	temperature
temperature zone	terbium	terminator line
terrestrial radiation	tertiary mirror	tertiary star
testing	thallium	theoretical astrophysics
theory	thermal conductivity	thermal emission
thermal equilibrium	thermal history	thermal instability
thermal property	thermal radiation	thermal stability
thermal structure	thermionic emission	thermodynamic equilibrium
thermodynamics	thermoluminescence	thermonuclear reaction
thermosphere	thickness	thin film
Thomson scattering	thorium	three-body problem
three-dimensional spectroscopy	three-dimensional spectrum	thulium
tidal disruption	tidal distortion	tidal friction
tidal interaction	tidal radius	tide
time measurement	time-resolved spectroscopy	time signal
time standard	time synchronization	time
timing equipment	tin	tip-tilt mirror
titanium oxide	titanium	topography
torus	total eclipse	trace element
tracking	trajectory	transfer function
transit circle	transit instrument	transition probability
transition region	transit telescope	transit time
transit	transmission grating	transmission
trans-Neptunian object	transparency	transplutonian planet
transport process	transverse velocity	trigonometric parallax
triple star	tritium	Trojan group
tropical year	Tropic of Cancer	Tropic of Capricorn
tropopause	troposphere	true anomaly
true position	T subdwarf	T Tauri star
Tully-Fisher relation	tungsten	turbidity
turbulence Earth atmosphere	turbulence star atmosphere	turnoff point
twilight	two-body problem	two-color diagram
two-color photometry	two-dimensional detector	two-dimensional spectroscopy
two-dimensional spectrum	two-spectrum binary star	Type Ia supernova
Type Ib supernova	Type Ic supernova	Type II supernova
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
U Geminorum star	ultraviolet astronomy	ultraviolet background
ultraviolet camera	ultraviolet color	ultraviolet continuum
ultraviolet detector	ultraviolet excess star	ultraviolet extinction
ultraviolet filter	ultraviolet line	ultraviolet luminosity
ultraviolet observatory	ultraviolet photography	ultraviolet photometry
ultraviolet radiation	ultraviolet source	ultraviolet spectrograph
ultraviolet survey	ultraviolet telescope	ultraviolet
U magnitude	umbra	underabundance
unit	Universal Time	universe
unsharp masking	upper atmosphere	upsilon Sagittarii star
uranium	Uranus	urca process
UT1	UU Herculis star	UV Ceti star
UV Persei star	UX Ursae Majoris star
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
vacuum technique	vacuum	vanadium
van Allen radiation belt	vapor deposition	variability
variable source	variable star	velocity curve
velocity dispersion	velocity distribution	velocity ellipsoid
velocity field	velocity of light	velocity space
velocity	ventilation	Venus
vernal equinox	vertical circle	Very Large Array
very large telescope	very long baseline interferometer	very long baseline interferometry
vibrational spectrum	vibration	vignetting
Vilnius photometry	virial theorem	virtual observatory
viscosity	visibility function	visible radiation
visible spectrum	vision	visual acuity
visual binary star	visual magnitude	visual observation
V magnitude	Voigt profile	volatile
volcano	von Zeipel theorem	VPH grating
VY Sculpturis star
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Walraven photometry	water ice	water maser
water vapor	water	waveform analysis
waveguide	wavelength	wave motion
wave propagation	wave	WCN star
WC star	weak G band star	weak gravitational lensing
weak interaction	weak-line T Tauri star	weather station
webcam	white dwarf	white hole
wide-angle lens	wide binary star	wide-field telescope
Wilson-Bappu effect	Wilson effect	window
wind vane	winter solstice	WN star
Wolf diagram	Wolf-Rayet star	WR star
W Ursae Majoris star	W Virginis star	WZ Sagittae star
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
xenon	X-ray absorption	X-ray astronomy
X-ray background	X-ray binary star	X-ray bright point
X-ray burst	X-ray continuum	X-ray detector
X-ray diffraction	X-ray emission	X-ray flare
X-ray fluorescence	X-ray identification	X-ray line
X-ray luminosity	X-ray map	X-ray nova
X-ray observatory	X-ray polarization	X-ray pulsar
X-ray quasar	X-ray radiation	X-ray scattering
X-ray source	X-ray spectrograph	X-ray spectroscopy
X-ray spectrum	X-ray star	X-ray structure
X-ray survey	X-ray telescope	X-ray transient
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Yagi antenna	y array	year
Yerkes classification	yoke mounting	young disk Cepheid
young star cluster	young star	ytterbium
yttrium
IVOAT labels:  A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Z Andromedae star	Z Camelopardalis star	Zeeman splitting
zenith distance	zenith hourly rate	zenith telescope
zenith tube	zenith	zero-age horizontal branch
zero-age main sequence	zero point	zinc
zirconium star	zirconium	zodiacal dust cloud
zodiacal dust	zodiacal light	zodiac
zone of totality	ZZ Ceti star

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Thu Jul 3 16:30:01 2008