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653 "H"

H
Hadamard mask imaging
hading of bands
Haig mounting
cross hairs
halation
Hale telescope
half bandwidth
half-half width
half-infinite medium
half-integral spin
half intensity breadth
half width at half maximum
half Moon
beam width to half-power
half-power beamwidth
half-power level
half power point
half-regular variable stars
half-shadow
half-wave dipole
half-wave (dipole) antenna
broadside array of half-wave dipoles
half-wave(length) plate
half-wave plate
half width
half-width
half width at half maximum
gelatine-silver halide emulsion
Hall conductivity
broad "halo"
halo
halo-and-core object
galactic halo emission
haloes
halo es of comet
halogen
halogen hydrides
halogen spectra
halo phenomenon
halo radiation
halos
() Hα.
cosmic noise intensity
H-α cut-off filter
H-α filter
in integrated light
central intensity
in light
line
line of nodes
markings
H-α prominence telescope
Hamiltonian
Hamilton's operator
hour hand
Handbook of the British astronomical association
H and D curve
H and K lines
hand magnifier
hand-tapping method
hard component
hardening fixing bath
image hard image
hard radiation
hard X ray region
hard X-rays
harmonic
harmonic frequencies
harmonic law
simple harmonic oscillator
harmonic ratio
harmonic relationship
harmonic vibrator
Hartebeesthoek radio observatory
Hartley-Huggins band
Hartley's law of doublet separating
Hartmann dispersion formula
Hartmann formula
Hartmann images
Hartmann mask
Hartmann photograph
Hartmann's constant
Hartmann screen
Hartmann sensor
Hartmann test
Harvard revised catalog
Harvard Standard regions
Harvard system
harvest moon
top hat exposure
H atom
Observatoire de Haute Provence
Haute Provence observatory
haversine
Haystack observatory
radiation hazard
optical haze
H-β filter
HD
HD catalog
HD system
HD types
HD-
HD-
photometer head
head bands
head of column of ionization
head of meteor
scheme of band heads
volumetric specific heat
heat-absorbing glass
heat absorption
heat capacity
heat conduction
heat conductivity
heat death
heat diffusion
heat diffusivity
heat equilibrium
heat flow
heat flux
heat index
solar heating
heat of dissociation
atomic heat of formation
heat of sublimation
heat-resisting glass
vault of heaven
heavenly
heavenly body
heavens
Heaviside F
Heaviside-Kennelly F
heavy hydrogen
heavy nuclei chamber
hedgerow
Hefner candle
spectrum height
height distribution
meteoric heights
height scale
valence theory of Heitler-London
heliacal rising
heliacal setting
helical antenna
helical focuser
heliocentric
heliocentric(al) orbit
heliocentric angle
heliocentric coordinates
heliocentric Julian date
heliocentric latitude
heliocentric longitude
heliocentric parallax
heliocentric system
heliocentric time
heliocentric velocity
radio heliograph
heliographic
heliographic chart
heliographic coordinates
heliographic latitude
heliographic longitude
heliographic position
heliometer
helioscope
helioseismology
heliostat
helium
helium atom
helium-like ion
helium-rich core
helium star
helix array
helmet
millionth of visible hemisphere
hemispherical south bearing
Henry Draper catalog
Henry Draper system
Hermite polynomial
Herschelian telescope
William Herschel telescope
Hershel catalogs
Hershelian telescope
Hershel wedge
hertz
Hertz formula
Hertzsprung gap
Hertzsprung-Russel diagram
Hertzsprung-Russell diagram
Herzberg bands
G heterochromatic photometry
super heterodyne receiver
heterogeneous perturbation
heteronuclear molecule
heteropolar binding
heterosphere
[] H I
HI
HI arm
H I cloud
H I complex
hidden mass in the galaxy
hidden side
H I emission
H I gas
high altitude nuclear explosion
high-altitude observatory
high-altitude rocket
high-altitude station
Center for High Angular Resolution Astronomy
high-chroma color
high-contrast image
high corona
field of high definition
high-dispersion spectrogram
high-dispersion spectrograph
high-energy astrophysics
high-energy component
high-energy electrons
high-energy particles
higher intensity component
higher intensity component of solar radio waves
very high frequency
high-frequency channel
high-frequency discharge
high-intensity emission
high-latitude
high-latitude prominence
at high latitudes
high-latitude station
highlight brightness
high-luminosity star
highly directive antenna
highly ionized
highly variable component
high pass filter
high-power bolometer
high-power telescope
high-pressure mercury arc
high resolution
high-resolution antenna
high resolution interferometer
high resolution. investigations
high-resolution map
high-resolution observations
high-resolution photography
high-resolution spectroscopy
high-resolution studies
high-resolution survey
high-saturation color
high solar atmosphere
high-speed camera
high-speed developer
high-speed development
high-speed electrons
high-speed particles
high-speed reduction
high-velocity electrons
high-velocity stars
[] H II
H II cloud
H II emission
H II region
HIPPARCOS
Hipparcos catalog
Hipparcos spacecraft
H I radio waves
H I region
hiss
astronomical history
magnetic life history of sun-spot
H-like ion
H line
H-line absorption
H line emission
H-line frequency
Hobby-Eberly telescope
Hoitsmark theory
plate holder
central hole
hole conduction
hollow cathode
hollow cathode discharge
hologram
holography
Holtsmark function
Homestake neutrino detector
homogeneity
homogeneity of the universe
homogeneous field
chemically homogeneous model
homogeneous perturbation
homogeneous plasma
homogeneous quiet arc
homogeneous radiation
homogeneous smoothed-out model
homogeneous universe
homological transform design
homologous contraction
homologous flare
homonuclear molecule
homopolar binding
homopolar force
homopolar molecule
homosphere
honeycomb collimator
honeycomb mirror
Hooke's law
hook method
Mount Hopkins observatory
star hopping
true horizon
horizontal axis
horizontal collimator
horizontal component
horizontal coordinates
horizontal dial
horizontal flexure
horizontal intensity
horizontal parallax
horizontal screw
horizontal slide
horizontal solar telescope
horizontal telescope
primary horn
horn antenna
horn feed
horseshoe