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
Descriptionaltbroadernarrowerrelated
Lagrangian point      (LagrangianPoint)
Lagrangian point
 libration point celestial mechanics ,
gravitation ,
gravitational field
 
lambda eridani star      (lambdaEridaniStar)
lambda Eridani star
 Be star ,
pulsating variable star
 
lamp      (lamp)
lamp
 comparison lamp ,
flat field lamp 		calibration ,
electromagnetic radiation
 
lanthanum      (lanthanum)
lanthanum (atomic number 57)
 La fundamental chemical element ,
rare earth
FVH: new (2007-OCT-25)
 
Large Magellanic Cloud      (LargeMagellanicCloud)
Large Magellanic Cloud
 LMC Magellanic cloud Small Magellanic Cloud
 
large scale structure      (largeScaleStructure)
large scale structure
 cosmic string ,
cosmology ,
universe
FVH: added RT COSMOLOGY (2007-SEP-21)
 
laser      (laser)
laser
 coherence ,
electron pumping ,
light coherence ,
lunar laser ranging ,
maser ,
optical radar ,
population inversion ,
satellite laser ranging ,
stimulated emission
 
  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
Descriptionaltbroadernarrowerrelated
laser ranging      (laserRanging)
laser ranging
 lunar laser ranging ,
satellite laser ranging 		optical radar
 
late-type dwarf      (lateTypeDwarf)
late-type dwarf star
 cool dwarf star ,
late type dwarf star 		dwarf ,
late-type star ,
low-luminosity star 		K dwarf ,
L dwarf ,
M dwarf ,
brown dwarf ,
red dwarf flare star
 
late-type galaxy      (lateTypeGalaxy)
late-type galaxy
 late type galaxy galaxy spiral galaxy
 
late-type giant      (lateTypeGiant)
late-type giant star
 cool giant star ,
late type giant star 		giant ,
late-type star 		K giant ,
M giant ,
Mira variable star ,
carbon star ,
heavy metal star ,
irregular variable star ,
semi-regular variable star 		asymptotic giant branch ,
funneling ,
post-asymptotic giant branch ,
red giant tip
 
late-type star      (lateTypeStar)
late-type star
 cool star ,
late type star 		star K star ,
M star ,
N star ,
R star ,
S star ,
late-type dwarf ,
late-type giant ,
late-type subdwarf ,
late-type supergiant 		Wilson-Bappu effect ,
molecular band ,
molecular line ,
molecular spectrum
 
late-type subdwarf      (lateTypeSubdwarf)
late-type subdwarf
 cool subdwarf star late-type star ,
low-luminosity star ,
subdwarf 		L subdwarf ,
brown dwarf
 
late-type supergiant      (lateTypeSupergiant)
late-type supergiant star
 cool supergiant star late-type star ,
supergiant 		K supergiant ,
M supergiant ,
RV Tauri star 		irregular variable star ,
long period variable star
 
late-type variable star      (lateTypeVariableStar)
late-type variable star
 Me variable star Me star
 
latitude determination      (latitudeDetermination)
latitude determination
 latitude variation Chandler wobble ,
astrometry
on Earth surface
 
latitude      (latitude)
latitude
 Declination ,
ecliptic latitude ,
Galactic latitude ,
supergalactic latitude
on celestial sphere
 
  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
Descriptionaltbroadernarrowerrelated
latitude variation      (latitudeVariation)
latitude variation
 latitude determination Chandler wobble ,
polar motion
on Earth surface
 
lawrencium      (lawrencium)
lawrencium (atomic number 103)
 Lr fundamental chemical element
FVH: new (2007-OCT-25)
 
Lb variable star      (LbVariableStar)
Lb variable star
 giant
 
Lc variable star      (LcVariableStar)
Lc variable star
 supergiant
 
L dwarf      (LDwarf)
L dwarf
 brown dwarf ,
late-type dwarf 		L subdwarf ,
spectral type ,
titanium oxide
FVH: new (2007-OCT-2)
 
lead      (lead)
lead (atomic number 82)
 Pb fundamental chemical element
FVH: new (2007-OCT-25)
 
Lemaitre universe      (LemaitreUniverse)
Lemaitre universe
 cosmology Big Bang theory
 
lens antenna      (lensAntenna)
lens antenna
 lens antennas antenna
 
lens design      (lensDesign)
lens design
 lens
 
lens      (lens)
lens
 optical component camera lens ,
corrector plate ,
field corrector ,
primary lens 		antireflection coating ,
catadioptric system ,
coating ,
collimator ,
dioptric system ,
eyepiece ,
figuring ,
glass ,
lens design ,
optical aberration ,
optical instrument ,
optical material ,
optical surface ,
polishing ,
refraction ,
refractive index
 
  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
Descriptionaltbroadernarrowerrelated
lenticular galaxy      (lenticularGalaxy)
lenticular galaxy
 S0 galaxy disk galaxy ,
galaxy 		ansa
 
lepton      (lepton)
lepton
 elementary particle ,
particle 		electron ,
muon ,
neutrino ,
positron 		boson ,
quark
 
L galaxy      (LGalaxy)
low surface-brightness galaxy (Yerkes classification scheme)
 galaxy Yerkes classification ,
surface brightness
 
libration      (libration)
libration
 physical libration Moon
 
life      (life)
life
 extraterrestrial life anthropic principle ,
origin
 
light absorption      (lightAbsorption)
light absorption
 absorption atmospheric extinction ,
electromagnetic radiation ,
interstellar absorption ,
interstellar reddening ,
light scattering ,
visible radiation
 
light coherence      (lightCoherence)
light coherence
 coherence laser
 
light cone      (lightCone)
light cone
 future light cone ,
past light cone 		velocity of light
 
light curve      (lightCurve)
light curve
 photometric element magnitude ,
maximum ,
minimum ,
period ,
phase shift ,
phase wave ,
variable star ,
velocity curve
 
light emission      (lightEmission)
light emission
 photoluminescence aurora ,
chemiluminescence ,
continuous spectrum ,
emission spectrum ,
luminescence
 
  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
Descriptionaltbroadernarrowerrelated
light interference      (lightInterference)
light interference
 interference wave electromagnetic radiation ,
optical film ,
optical filter ,
optical interferometry ,
visible radiation
 
light polarization      (lightPolarization)
light polarization
 polarization wave X-ray polarization ,
circular polarization ,
plane polarization 		Faraday effect ,
electromagnetic radiation ,
optical property ,
polarimetry ,
polarized light ,
polarized radiation ,
radiation scattering ,
stokes parameter
 
light pollution      (lightPollution)
light pollution
 pollution air pollution ,
site protection
 
light scattering      (lightScattering)
light scattering
 radiation scattering ,
scattering 		Compton scattering ,
Rayleigh scattering ,
Thomson scattering 		Raman spectrum ,
afterglow ,
atmospheric extinction ,
brillouin spectrum ,
electromagnetic radiation ,
halo ,
interstellar reddening ,
light absorption ,
luminescence ,
visible radiation ,
zodiacal light
 
light year      (lightYear)
light year
 distance ,
parsec ,
velocity of light ,
year
 
limb brightening      (limbBrightening)
limb brightening
 atmosphere ,
limb darkening ,
stellar atmosphere ,
temperature
 
limb darkening      (limbDarkening)
limb darkening
 atmosphere ,
limb brightening ,
solar atmosphere ,
stellar atmosphere ,
temperature
 
limiting magnitude      (limitingMagnitude)
limiting magnitude
 detector ,
precision ,
sensitivity ,
signal detection ,
signal-to-noise ratio
 
linearity calibration      (linearityCalibration)
linearity calibration
 calibration
FVH: new (2007-OCT-3)
 
line blanketing      (lineBlanketing)
line blanketing
 metal line ,
spectral line ,
ultraviolet radiation
 
  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
Descriptionaltbroadernarrowerrelated
line blending      (lineBlending)
line blending
 spectral line ,
spectral resolution
 
line blocking      (lineBlocking)
line blocking
see under line blanketing
 
line broadening      (lineBroadening)
line broadening
 spectral line broadening Doppler broadening ,
Stark broadening ,
collision broadening ,
natural line broadening ,
pressure broadening 		Zeeman splitting ,
convection ,
equivalent width ,
instrumental profile ,
line formation ,
line width ,
natural line width ,
spectral line ,
stellar atmosphere ,
turbulence star atmosphere
 
line formation      (lineFormation)
line formation
 spectral line formation absorption line ,
damping constant ,
emission line ,
g value ,
gf value ,
line broadening ,
oscillator strength ,
solar atmosphere ,
spectral line ,
stellar atmosphere ,
transition probability
 
line identification      (lineIdentification)
line identification
 absorption line ,
emission line ,
spectral line
 
line intensitite      (lineIntensitite)
line intensitite
 emission line ,
spectral line
 
line of sight      (lineOfSight)
line-of-sight
 location location behind ,
location between ,
location in front
FVH: new (2007-SEP-21)
 
line profile      (lineProfile)
line profile
 profile P Cygni line profile ,
instrumental profile 		absorption line ,
emission line ,
residual intensity ,
spectral line
 
line ratio      (lineRatio)
line ratio
 absorption line ,
emission line ,
spectral line
 
liner galaxy      (linerGalaxy)
liner galaxy
 emission line galaxy Seyfert galaxy ,
quasar
FVH: new (2007-SEP-21)
 
  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
Descriptionaltbroadernarrowerrelated
line shift      (lineShift)
line shift
 spectral line shift blueshift ,
redshift 		Doppler effect ,
Zeeman splitting ,
radial velocity
 
line spectrum      (lineSpectrum)
line spectrum
 absorption spectrum ,
emission spectrum 		Voigt profile ,
pressure broadening ,
ultraviolet line
 
line width      (lineWidth)
line width
 spectral line width equivalent width ,
natural line width 		Doppler broadening ,
Milne Eddington approximation ,
Tully-Fisher relation ,
g value ,
gf value ,
instrumental profile ,
line broadening ,
oscillator strength ,
spectral type ,
stellar atmosphere ,
surface gravity ,
transition probability
 
lithium      (lithium)
lithium (atomic number 3)
 Li fundamental chemical element lithium-poor star ,
lithium star
FVH: new (2007-OCT-25)
 
lithium-poor star      (lithiumPoorStar)
lithium-poor star
 lithium poor star metal-poor star lithium
 
lithium star      (lithiumStar)
lithium star
 Li star ,
lithium rich star ,
lithium-rich star 		star giant ,
lithium
 
lithosphere      (lithosphere)
lithosphere
 mantle ,
planet
 
L magnitude      (LMagnitude)
L magnitude
 apparent magnitude infrared photometry ,
near infrared radiation
 
lobe      (lobe)
lobe
 radio structure radio source
radio source feature
 
Local Group      (LocalGroup)
Local Group of galaxies
 galaxy group ,
nearby galaxy 		Magellanic cloud ,
Milky Way galaxy 		bright galaxy
 
  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
Descriptionaltbroadernarrowerrelated
Local Standard of Rest      (LocalStandardOfRest)
Local Standard of Rest
 LSR ,
L.S.R. 		Sun ,
orbit ,
peculiar motion ,
peculiar velocity ,
proper motion ,
stellar motion
 
Local Supercluster      (LocalSupercluster)
Local Supercluster of galaxies
 galaxy cluster Great Attractor ,
galaxy
 
local thermodynamic equilibrium      (localThermodynamicEquilibrium)
local thermodynamic equilibrium
 LTE thermodynamic equilibrium non-LTE transfer ,
thermal equilibrium ,
thermal instability ,
thermal stability ,
thermodynamics
 
location behind      (locationBehind)
location behind something else
 location line of sight ,
location between ,
location in front
FVH: new (2007-SEP-21)
 
location between      (locationBetween)
location between
 location line of sight ,
location behind ,
location in front
FVH: new (2007-SEP-21)
 
location in front      (locationInFront)
location in front of something else
 location line of sight ,
location behind ,
location between
FVH: new (2007-SEP-21)
 
location      (location)
having to do with cosmic location
 line of sight ,
location behind ,
location between ,
location in front
FVH: new (2007-SEP-21)
 
log g value      (logGValue)
log(g) value
 g value gf value
ES: new (2007-OCT-8)
logarithm reference needed!
 
long baseline interferometer      (longBaselineInterferometer)
long baseline interferometer
 interferometer ,
radio interferometer 		optical interferometer ,
very long baseline interferometer
 
long baseline interferometry      (longBaselineInterferometry)
long baseline interferometry
 interferometry ,
radio interferometry 		optical interferometry ,
radio astrometry ,
very long baseline interferometry
 
  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
Descriptionaltbroadernarrowerrelated
longitude      (longitude)
longitude
 Galactic longitude ,
ecliptic longitude ,
Right Ascension ,
supergalactic longitude
on celestial sphere
 
long period comet      (longPeriodComet)
long period comet
 comet
 
long period variable star      (longPeriodVariableStar)
long period variable star
 pulsating variable star Mira variable star ,
RV Tauri star ,
S Vulpeculae star ,
WZ Sagittae star 		late-type supergiant
 
long slit      (longSlit)
long slit
 spectrograph slit
FVH: new (2007-OCT-3)
 
long slit spectrum      (longSlitSpectrum)
long slit spectrum
 spectrograph slit ,
three-dimensional spectrum ,
two-dimensional spectrum
FVH: added RT SPECTROGRAPH_SLITS (2007-SEP-21)
 
loop      (loop)
loop
combine with other terms
 
low-luminosity star      (lowLuminosityStar)
low-luminosity star
 low luminosity star star late-type dwarf ,
late-type subdwarf 		dwarf ,
low-mass star
 
low-mass star      (lowMassStar)
low-mass star
 low mass star star HZ Herculis star ,
black dwarf 		T dwarf ,
brown dwarf ,
dwarf ,
low-luminosity star ,
low-mass X-ray binary star
FVH+ES: moved brown_dwarf to RT (2007-OCT-11)
 
low-mass X-ray binary star      (lowMassXRayBinaryStar)
low-mass X-ray binary star
 LMXB X-ray binary star accretion disk ,
cataclysmic variable star ,
high-mass X-ray binary star ,
low-mass star ,
neutron star
 
low-state      (lowState)
photometric low state of variable object
 high-state ,
outburst ,
variability ,
variable source
FVH: new (2007-OCT-8)
 
  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
Descriptionaltbroadernarrowerrelated
low-temperature plasma      (lowTemperaturePlasma)
low temperature plasma
 plasma
 
L subdwarf      (LSubdwarf)
L subdwarf
 brown dwarf ,
late-type subdwarf ,
subdwarf 		L dwarf
FVH: new (2007-OCT-9)
 
luminescence      (luminescence)
luminescence
 candoluminescence chemiluminescence ,
thermoluminescence 		afterglow ,
electromagnetic radiation ,
fluorescence ,
light emission ,
light scattering ,
noctilucent cloud ,
visible radiation
 
luminosity classification      (luminosityClassification)
luminosity classification
 classification dwarf ,
giant ,
luminosity class ,
spectral classification ,
spectral type ,
subgiant ,
surface gravity
 
luminosity class      (luminosityClass)
luminosity class
 MK classification luminosity ,
luminosity classification ,
spectral type
see: luminosity classification
 
luminosity-dispersion relation      (luminosityDispersionRelation)
luminosity-dispersion relation
 correlation Faber-Jackson relation ,
fundamental plane 		luminosity ,
velocity dispersion
FVH: new (2007-OCT-9)
 
luminosity distribution      (luminosityDistribution)
luminosity distribution
 brightness temperature ,
isophotal diameter ,
isophot
 
luminosity function      (luminosityFunction)
luminosity function
 galaxy ,
galaxy cluster ,
star cluster ,
stellar evolution
 
luminosity      (luminosity)
luminosity
 X-ray luminosity ,
ultraviolet luminosity 		Hertzsprung-Russell diagram ,
MK classification ,
absolute magnitude ,
brightness ,
flux ,
flux density ,
intensity ,
luminosity class ,
luminosity-dispersion relation ,
mass to light ratio ,
surface gravity
FVH: removed UF absolute_intensity as unphysical misnomer (2007-SEP-24)
 
luminous arc      (luminousArc)
luminous arc produced by gravitational lensing
 arc ,
gravitationally lensed source 		galaxy cluster ,
gravitational lensing ,
quasar
FVH: changed UF arc to BT ARCS and QUASARS to CLUSTERS_OF_GALAXIES (2007-OCT-1)
FVH: moved BT arc to RT arc and added BT gravitationally_lensed_source (2007-OCT-8)
 
  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
Descriptionaltbroadernarrowerrelated
luminous blue variable star      (luminousBlueVariableStar)
luminous blue variable star
 early-type variable star ,
high-luminosity star 		early-type supergiant
 
lunar dome      (lunarDome)
lunar dome
 Moon ,
surface of celestial body
 
lunar eclipse      (lunarEclipse)
lunar eclipse
 eclipse Moon ,
Saros cycle ,
Sun ,
penumbra ,
umbra
 
lunar laser ranging      (lunarLaserRanging)
lunar laser ranging
 laser ranging Moon ,
laser ,
optical radar ,
satellite laser ranging
 
lunar      (lunar)
lunar
combine lunar or Moon with other terms; also see Moon
 
lunar occultation      (lunarOccultation)
occultation by the Moon
 occultation Moon
FVH: new (2007-OCT-8)
 
lunar phase      (lunarPhase)
phase of the Moon
 phase Moon Saros cycle ,
illumination ,
metonic cycle ,
phase angle ,
phase defect ,
phase effect ,
terminator line
 
lunar theory      (lunarTheory)
lunar theory
 Earth-Moon system ,
Moon ,
celestial mechanics
 
lutetium      (lutetium)
lutetium (atomic number 71)
 Lu fundamental chemical element ,
rare earth
FVH: new (2007-OCT-25)
 
Lyman alpha      (LymanAlpha)
Lyman alpha
 Lyman series ,
resonance line 		Lyman alpha forest
 
  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
Descriptionaltbroadernarrowerrelated
Lyman alpha forest      (LymanAlphaForest)
Lyman alpha forest
 Lyman alpha ,
absorption line ,
intergalactic absorption ,
quasar ,
redshift
 
Lyman beta      (LymanBeta)
Lyman beta
 Lyman series
 
Lyman continuum      (LymanContinuum)
Lyman continuum
 hydrogen spectrum ultraviolet radiation
 
Lyman series      (LymanSeries)
Lyman series
 hydrogen spectrum Lyman alpha ,
Lyman beta 		Balmer series ,
Brackett series ,
Paschen series ,
Pfund series ,
ultraviolet radiation
 
Thu Jul 3 15:11:33 2008