• Eagle mounting
• early spectral types
• early stars
• early-type
• early-type stars
• earth
• Earth curvature
• earth-grazers
• earth-grazing minor planets
• earthlight
• earthlight on the Moon
• Earth-Mars distance
• Earth-Moon system
• earthquake
• Earth satellite
• Earth satellite orbit
• Earth's atmosphere
• Earth's axis
• Earth's center
• Earth's core
• Earth's crust
• Earth's equator
• Earth's gravitational pull
• Earth's gravity
• earthshine
• earthshine on the Moon
• Earth's immediate interplanetary environment
• Earth's ionosphere
• Earth's magnetic field
• Earth's mantle
• Earth's motion
• Earth's orbit
• Earth's orbit radius
• Earth spheroid
• Earth's radius
• Earth's rotation
• Earth's shadow
• Earth's surface
• Earth's trail
• Earth-Sun distance
• east
• eastern elongation
• eastern limb
• eastern quadrature
• eastern spot
• east limb
• east point
• east-west antenna
• east-west arm
• east-west asymmetry
• east-west baseline
• east-west direction
• east-west line
• ebb
• Eberhard's effect
• eccentric anomaly
• eccentricity
• eccentric orbit
• echelette
• echelette grating
• echelle
• echelle grating
• echelle spectrograph
• echelogram
• echelon
• echelon arrangement
• echelon grating
• echelon step
• echo
• echo amplitude
• echo cross-section
• echo cross-section of radar
• echo decay
• echo from Venus
• echoing power
• echo intensity
• echo method
• echo power
• echo pulse
• echo sounding
• echo strength
• eclipse
• eclipsed body
• eclipsed conformation
• eclipse observation
• eclipse photograph
• eclipse results
• eclipse spectacles
• eclipse technique
• eclipse theory
• eclipse year
• eclipsing binary
• eclipsing binary star
• eclipsing body
• eclipsing double star
• eclipsing variables
• ecliptic
• ecliptic coordinates
• ecliptic latitude
• ecliptic longitude
• ecliptic pole
• ecliptic system
• Eddington approximation
• Eddington-Barbier relation
• Eddington model
• Eddington transfer equation
• edge
• edge effect
• edge enhancement
• edge support
• edge-supported
• edge support pad
• effect
• effective aperture
• effective area
• effective charge
• effective collecting area
• effective echo cross-section
• effective focal length
• effective focal ratio
• effective nuclear charge
• effective quantum number
• effective radius
• effective receiving area
• effective reflecting area
• effective scale Value
• effective sensitivity
• effective size of the Sun
• effective solid angle of antenna
• effective surface gravity
• effective temperature
• effective-temperature spectral-type relation
• effective wavelength
• effective width
• effect of aging
• effect of confusion
• effect of eccentricity
• effects of clustering of galaxies
• effects of wind
• Effelsberg radio telescope
• efficiency
• efficiency factor
• efficient
• e-folding time
• eggcrate form
• eidophor
• eigenfunction
• eigenvalue
• Einstein coefficient
• Einstein-de Sitter cosmology
• Einstein-de Sitter model
• Einstein-de Sitter universe
• Einstein probability coefficient
• Einstein's equations
• Einstein's field relations
• Einstein shift
• Einstein's model
• Einstein's universe
• Einstein transition probability
• ejection
• ejection of matter
• ejection of particles
• elastic collision
• elastic wave
• electrical conductivity
• electrically driven tuning fork
• electric dipole
• electric dipole radiation
• electric disruption
• electric eye
• electric field
• electric focuser
• electric focusing
• electric furnace
• electric light vector
• electric moment
• electric motor
• electric-motor drive
• electric-motor sidereal drive
• electric multipole
• electric multipole radiation
• electric quadrupole
• electric quadrupole radiation
• electrodeless lamp
• electrodynamics
• electro-magnetic radiation
• electromagnetic radiation
• electromagnetic spectrum
• electromagnetic vibrations
• electromagnetic waves
• electron
• electron affinity
• electron beam parametric amplifier
• electron-binding energy
• electron concentration
• electron density
• electron density distribution
• electron density per unit length
• electron detachment
• electronegativity
• electron envelope
• electron gas
• electron gyro radiation
• electronic band spectrum
• electronic camera
• electronic computer
• electronic computing machine
• electronic conduction
• electronic configuration
• electronic digital computer
• electronic image converter
• electronic image format
• electronic level
• electronic machine
• electronic-mechanical device
• electronic motion
• electronics
• electronic state
• electronic transition
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• electronic transition probability
• electron loss rate
• electron mass
• electron multiplier
• electronographic camera
• electronographic-type image converter
• electron pair
• electron paramagnetic resonance
• electron pressure
• electron production rate
• electron radius
• electron scattering
• electron sensitive
• electron-sensitive emulsion
• electron shell
• electron spin resonance
• electron stream
• electron temperature
• electron-transfer spectrum
• electron transition
• electron tube
• electron volt
• electron-volt
• electrophotometer
• electropositivity
• electrostatic attraction
• electrostatic fluxmeter
• electrostatic interaction
• electrostatic radius
• element
• elementary antenna
• elementary shell
• elements
• elephants' trunks
• elevation
• elevation axis
• elevation movement
• elevator
• eliiptically polarized radio waves
• elimination
• ellipse
• ellipsoid
• ellipsoidal
• ellipsoidal galaxy
• elliptical
• elliptical aberration
• elliptical companion
• elliptical galaxy
• elliptically polarized
• elliptically polarized beam
• elliptically polarized radiation
• elliptical motion
• elliptical nebula
• elliptical orbit
• elliptical polarization
• elliptical satellite
• elliptical system
• elliptic galaxy
• ellipticity
• elliptic mirror
• elliptic orbit
• elongated ellipse
• elongated orbit
• elongation
• Emden function
• Emden's equation
• Emden's tables
• emergent
• emergent flux
• emergent radiation
• emersion
• emission
• emission-arc method
• emission band
• emission band progression
• emission burst emission
• emission cell
• emission coefficient
• emission component
• emission core
• emission density
• emission feature
• emission from disk of the Galaxy
• emission from the whole Sun
• emission line
• emission measure
• emission mechanism
• emission nebula
• emission of radiation
• emission of radio waves
• emission oscillator strength
• emission process
• emission profile
• emission region
• emission spectrum
• emissive
• emissive power
• emissive process
• emissivity
• emittance
• emitted
• emitted light
• emitted pulse
• emitter
• emitting area
• emitting light
• emitting power
• emitting process
• emitting region
• emmetropic eye
• empirical curve of growth
• empirical data
• empirical model
• emulsion
• emulsion scratch
• emulsion sensitivity
• enchanced solar radio waves
• end
• end-fire array
• endothermic reaction
• energetic electrons
• energy
• energy balance
• energy barrier
• energy continuum
• energy density
• energy distribution
• energy emission
• energy generation
• energy generation in stars
• energy generation model
• energy level
• energy level diagram
• energy production
• energy production in stars
• energy range
• energy sensitive
• energy sources in stars
• energy spectrum
• energy state
• energy transport
• energy wavelength curve
• enforced dipole radiation
• engine
• engineering
• English equatorial
• English mounting
• enhanced emission
• enhanced level radiation
• enhanced line
• enhanced radiation
• enhanced ultraviolet radiation
• enhancement
• enlargement
• enlargement ratio
• enlarger
• enlarging
• enlarging apparatus
• enthalpy
• entrance pupil
• entropy
• envelope
• envelope density
• envelope pattern
• envelope resolution
• environment
• ephemerides
• ephemeris
• ephemeris computation
• ephemeris longitude
• ephemeris meridian
• ephemeris time
• epicenter
• epoch
• epoch of equinox
• epoch of maximum
• epoch of minimum
• epoch of observation
• Epsilon telescopes
• equal-altitude method
• equal brightness photometer
• equality-of-contrast photometer
• equal sensitivity contours
• equation
• equation of equilibrium
• equation of light
• equation of the equinoxes
• equation of time
• equations of condition
• equator
• equatorial
• equatorial acceleration
• equatorial band
• equatorial bulge
• equatorial coordinates
• equatorial dial
• equatorial diameter
• equatorial electrojet
• equatorial horizontal parallax
• equatorial mounting
• equatorial orbit
• equatorial parallax
• equatorial period
• equatorial plane
• equatorial platform
• equatorial prominence
• equatorial radius
• equatorial region
• equatorial star
• equatorial streamers
• equatorial system
• equatorial telescope
• equatorial telescope mounting
• equatorial zone
• equator point
• equidensite
• equilateral prism
• equilibrium
• equilibrium distribution
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• equilibrium internuclear distance
• equilibrium radiation
• equilibrium state
• equilibrium temperature
• equinoctial
• equinoctial point
• equinoctial year
• equinox
• equinoxes
• equinox of a catalogue
• equipment
• equipment cabin
• equipotential surface
• equivalent
• equivalent angular size
• equivalent collecting area
• equivalent current system
• equivalent electron
• equivalent focal length
• equivalent orbital
• equivalent resistor
• equivalent temperature
• equivalent width
• erect image
• erecting prism
• Eregion
• Erfle eyepiece
• eroded material
• erosion
• erroneous scale Value
• error
• error box
• error in level reading
• error in position
• error of orientation
• error of unit weight
• errors
• error signal
• errors in declinations
• eruption
• eruption hypothesis
• eruptive activity
• eruptive arch
• eruptive prominence
• escape
• escape of radiation
• escape of radio waves
• escape speed
• escape velocity
• ESR-spectrometer
• estimate
• etalon
• ETX telescope
• European Southern Observatory
• European Space Agency
• eV
• even
• even atomic term
• even-even
• even-even nucleus
• evening sky
• evening star
• even-odd
• even-odd nucleus
• even spot cycle
• even state
• event
• Evershed effect
• evidence
• evolution
• evolutionary cosmology
• evolutionary model
• evolutionary theory
• evolutionary tracks
• evolutionary universe
• evolution diagram
• evolution of the universe
• evolve
• evolving universe
• E-W arm
• E-W baseline
• exact expression
• exact position
• exceptional comet
• excess
• excess absorption
• excess energy
• excessive receiver noise
• excess noise temperature
• excess receiver noise
• excess receiver noise temperature
• exchange degeneracy
• exchange energy
• exchange force
• exchange integral
• exchange interaction
• exchange reaction
• excitation
• excitation energy
• excitation potential
• excitation temperature
• excited
• excited atom
• excited level
• excited state
• exciting agency
• exciting star
• exciton
• exfoliation
• exhausted developer
• exit pupil
• ex-nova
• exosphere
• exothermic reaction
• expanding envelope
• expanding evolutionary model
• expanding shell
• expanding universe
• expansion
• expansion coefficient
• expansion of the universe
• expansion term
• expansion velocity
• expedition
• expel
• experiment
• experimental error
• experimental uncertainty
• exploding galaxy
• exploding stars
• exploration
• exploratory rocket
• explosion
• explosion shell
• explosion theory
• explosive phase of flare
• exponential integral
• expose
• exposed silver grains
• exposure
• exposure data
• exposure index
• exposure meter
• exposure tables
• exposure test
• exposure time
• expression
• expulsion
• extended atmosphere
• extended background
• extended envelope
• extended object
• extended range
• extended series of observations
• extended source
• extent of the Galaxy
• exterior
• external
• external galaxy
• external noise
• external object
• extinction
• extinction coefficient
• extinct volcano
• extraaxial image
• extraexcitation
• extrafocal image
• extragalactic
• extragalactic body
• extragalactic component
• extragalactic emission
• extragalactic hydrogen line studies
• extragalactic nebula
• extragalactic object
• extragalactic radiation
• extragalactic radio star
• extragalactic research
• extragalactic source
• extragalactic space
• extragalactic system
• extragranular factor
• extrahead
• extraordinary ray
• extraordinary wave
• extrapolation
• extrasensitivity
• extra sensitivity
• extraterrestrial
• extraterrestrial body
• extraterrestrial intelligence
• extraterrestrial light
• extraterrestrial observations
• extraterrestrial observatory
• extraterrestrial particles
• extraterrestrial radiation
• extraterrestrial radio noise
• extraterrestrial radio waves
• extraterrestrial signal
• extraterrestrial source
• extraterrestrial space
• extreme ultraviolet
• extreme ultraviolet region
• extrinsic photoeffect
• eye
• eye-and-ear method
• eye-end of telescope
• eye estimate
• eyeglass
• eye lens
• eyepiece
• eyepiece field
• eyepiece micrometer
• eyepiece mount
• eyepiece projection
• eyepiece slide
• eye relief
• eye sensitivity curve
• eyesight
• eye's pupil
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