home *** CD-ROM | disk | FTP | other *** search
- aberration_stellar
- absolute_luminosity
- absolute_magnitude
- absorption_line
- absorption_spectrum
- achernar
- adhara
- adonis
- adrastea
- aeon
- airy_disc
- albedo
- albireo
- alcyone
- aldebaran
- algol
- allende_meteorite
- all-sky_camera
- almach
- almagest
- almanac
- alpha
- alpha_centauri
- alpheratz
- altair
- alt-azimuth_mounting
- altitude
- amalthea
- amor_group
- andromeda
- andromeda_galaxy
- andromedids
- angle
- angular_acceleration
- angular_diameter
- angular_distance
- angular_momentum
- angular_resolution
- angular_velocity
- annual_parallax
- annular_eclipse
- anomaly
- antares
- anthropic_principle
- antimatter
- antlia
- antoniadi_scale
- aperture_optical
- apex
- apex_solar
- aphelion
- aphrodite_terra
- apollo_group
- apollo_program
- apparent
- apparent_luminosity
- apparent_magnitude
- apparent_noon
- apparent_solar_time
- apus
- aquarids
- aquarius
- aquila
- ara
- arc_minute
- arc_second
- archaeoastronomy
- arcturus
- ariel
- aries
- aristarchus
- aristotle
- arsia_mons
- ascending_node
- ascraeus_mons
- ashen_light
- aspect
- association
- asterism
- asteroid
- asteroid_belt
- asteroid_number
- astrology
- astrometry
- astronautics
- astronomer
- astronomical_distance
- astronomical_twilight
- astronomical_unit
- astronomy
- astrophotography
- atlas
- atmosphere
- atmospheric_refraction
- auriga
- aurora
- aurora_borealis
- autumnal_equinox
- axial_period
- azimuth
- b_stars
- band_spectrum
- bar
- barium_star
- barlow_lens
- barnards_star
- barred_spiral_galaxy
- barycentre
- barycentric_coordinates
- baryons
- basalt
- baseline
- bayer_johann__1572-1625
- bayer_letters
- bedrock
- beehive
- belinda_uranus_satellite
- bennetts_comet
- beta
- beta_lyrae_stars
- beta_particle
- beta_pictoris
- beta_regio
- betelgeuse
- bianca_uranus_satellite
- big_bang
- big_crunch
- big_dipper
- binary_stars
- binoculars
- bl_lacertae_objects
- black_body
- black_drop
- black_dwarf
- black_hole
- blackbody_temperature
- blackeye_galaxy
- blaze_star
- blink_comparator
- blink_microscope
- blue_snowball
- blue_straggler
- blueshift
- bodes_law
- bolide
- bootes
- boss_general_catalogue
- brahe_tycho_1546-1601
- bright_star_catalogue
- brown_dwarf
- bubble_nebula
- bug_nebula
- burst
- burster
- bw_stars
- byte
- caelum
- caldera
- calendar
- california_nebula
- callisto
- calypso
- camelopardalis
- canals
- cancer
- canes_venatici
- canis_major/canis_minor
- canopus
- cape_canaveral
- cape_photographic_durchmusterung
- capella
- capricornids
- capricornus
- captured_atmosphere
- captured_rotation
- carbon_cycle
- carbon_star
- cardinal_points
- carina
- carme
- carpathians
- cartwheel_galaxy
- cassegrain_focus
- cassegrain_telescope
- cassini
- cassini_division
- cassiopeia
- cassiopeia_a
- castor
- catadioptric
- caucasus_mountains
- ccd
- cd_galaxy
- celestial_axis
- celestial_coordinates
- celestial_equator
- celestial_mechanics
- celestial_poles
- celestial_sphere
- celsius_anders
- centaurus
- centaurus_a
- centrifugal_force
- centripetal_force
- cepheids
- cepheus
- ceres
- cetus
- ch_stars
- chamaeleon
- chandler_wobble
- charge-coupled_device
- charon
- chiron
- chondrite
- chromosphere
- chryse_planitia
- circinus
- circular_motion
- circumpolar_star
- circumstellar_matter
- cirrus_nebula
- civil_time
- civil_twilight
- clavius
- cluster
- clusters_of_galaxies
- coalsack_nebula
- cobe
- cocoon_nebula
- coelostat
- collimation
- colour_index
- colour-magnitude_diagram
- columba
- colure
- coma_berenices
- coma_cluster
- comet
- comet_shoemaker-levy/9
- comet_swift-tuttle
- cometary_nebula
- conic_section
- conjunction
- constellation
- continuous_spectrum
- coordinate_systems
- coordinated_universal_time
- copernican_system
- copernicus_nicolaus
- cor_caroli
- cordelia
- coriolis_effect
- corona
- corona_australids
- corona_australis
- corona_borealis
- corvus
- cosmic_radiation
- cosmic_rays
- cosmic_year
- cosmogony
- cosmology
- cosmos
- crab_nebula
- crater
- crepe_ring
- crescent
- cressida
- crux
- c-type_asteroids
- culmination
- cygnus
- cygnus_a
- d_region
- dark_adaption
- dark_halo
- dark_matter
- dark_nebula
- dawes_limit
- day
- day_solar
- daylight_saving_time
- daylight_stream
- dec
- declination
- declination_axis
- declination_circle
- deep-sky_object
- degenerate_star
- deimos
- delphinus
- delta
- deneb
- denebola
- density
- descending_node
- desdemona
- despina
- dew-cap
- diamond_ring_effect
- diffraction
- diffuse_cloud
- diffuse_interstellar_bands
- diffuse_nebula
- dione
- dioptric_system
- direct
- disc_galaxy
- disk
- dispersion
- distance_astronomical
- distance_modulus
- diurnal
- diurnal_motion
- dobsonian
- donatis_comet
- doppler_effect
- doppler_shift
- dorado
- double_galaxy
- double_star
- draco
- draconic_month
- draper_classification
- driving_clock
- dumbbell_nebula
- dwarf_galaxy
- dwarf_nova
- dwarf_planets
- dwarf_star
- dynamical_parallax
- eagle_nebula
- early-type_galaxies
- early-type_stars
- earth
- earth_geomagnetic_field
- earth_gravitational_field
- earth_grazers
- eccentric
- eccentricity
- eclipse
- eclipse_year
- eclipsing_binary
- ecliptic
- ecosphere
- einstein_albert
- ejecta
- elara
- electroglow
- electromagnetic_phenomena
- electromagnetic_radiation
- electron
- electron_density
- element
- ellipse
- ellipsoid
- elnath
- elongation
- emission_line
- emission_nebula
- enceladus
- encke_division
- enckes_comet
- entropy
- ephemeris
- ephemeris_time
- epimetheus
- epoch
- epsilon
- epsilon_aurigae
- epsilon_ring
- equator
- equatorial_coordinates
- equinox
- equinox_autumnal
- equinox_vernal
- equuleus
- eridanus
- eros
- escape_velocity
- eta_carinae
- eta_carinae_nebula
- e-type_asteroid
- europa
- evection
- evening_star
- event_horizon
- exit_pupil
- exobiology
- exosphere
- exponental_notation
- extinction
- extragalactic
- extragalactic_systems
- extraterrestrial_life
- eyepiece
- planetary_nebula
- supernova_remnants
- f_stars
- facula
- falling_star
- false-colour_imagery
- field_galaxy
- field_of_view
- finderscope
- fireball
- first_point_of_aries
- first_point_of_libra
- first_quarter
- fissure
- fixed_stars
- flamsteed_john
- flamsteed_number
- flare_solar
- flare_star
- focal_point
- fomalhaut
- fornax
- fornax_system
- fossa
- foucault_pendulum
- fraunhofer_lines
- frequency
- fusion
- gaia_hypothesis
- galactic_centre
- galactic_equator
- galactic_poles
- galatea
- galaxy
- galaxy_classification
- galilean_moons
- galilean_telescope
- galileo_galilei
- galileo_mission
- gamma
- ganymede
- garben
- garnet_star
- gas_giants
- gaspra
- gauss
- gegenschein
- gemini
- geminids
- geostationary
- geosynchronous
- geosynchronous_orbit
- giant
- gibbous
- giotto
- globe
- globule
- goddard_space_flight_center
- graffias
- gravitation
- gravitational_collapse
- gravitational_lensing
- gravity
- great_circle
- great_red_spot
- green_flash
- greenhouse_effect
- greenwich_mean_time
- gregorian_reflector
- grus
- h.i_and_h.ii_regions
- hadar
- halleys_comet
- halo
- hamal
- harvard_classification_of_stars
- harvest_moon
- helene
- heliacal_rising
- heliocentric_world_system
- heliostat
- helium
- hyperion
- iapetus
- iau
- icarus_-1566
- ice
- igneous
- inclination
- index_catalogue
- indus
- inferior_conjunction
- infrared_astronomy
- infrared_cirrus
- infrared_space_observatory
- inner_planets
- integral
- interlunar
- international_astronomical_union
- interplanetary_magnetic_field
- interplanetary_medium
- interstellar_matter
- inverse_square_law
- io
- ion
- ionosphere
- iras
- irregular_galaxy
- irregular_variable
- hellas_basin
- hemisphere
- henry_draper_catalogue
- hercules
- hermes
- herschel_sir_william
- hertzsprung-russell_diagram
- hesperus
- hidalgo
- hilda_asteroids
- hipparcos
- hirayama_family
- hoba_meteorite
- horizon
- horizon_2000
- horologium
- horsehead_nebula
- hour
- hour_angle
- hour_circle
- h-r_diagram
- hst
- hubble_space_telescope
- hungaria_group
- huygens_christiaan
- hyades
- hydra
- hydrosphere
- hydrus
- hyperbola
- hyperbolic_orbit
- hypergalaxies
- hyperion
- janus
- jet_propulsion_laboratory
- jet_stream
- joule
- jovian
- jpl
- julian_calendar
- julian_date
- julian_day
- juliet
- jupiter
- jupiters_rings
- jupiters_satellites
- kapteyns_star
- keck_observatory
- kelvin_temperature_scale
- kennedy_space_center
- kepler_johannes
- keplers_laws
- keyhole_nebula
- kilogram
- kilometre
- kiloparsec
- kuiper_belt
- lacerta
- larissa
- latitude
- lava
- laws_of_motion
- leda
- leo
- leo_minor
- leonids
- lepus
- libra
- libration
- light
- light_second
- light_year
- limb
- limiting_magnitude
- little_dipper
- local_group_of_galaxies
- local_supercluster
- local_time
- longitude
- luminosity
- lunar
- lunar_day
- lunation
- lupus
- lynx
- lyra
- lysithea
- magellan
- magellanic_clouds
- magma
- magnetic_star
- magnetosphere
- magnetotail
- magnitude
- main_sequence
- main-sequence_star
- major_axis
- major_planet
- mantle
- mare
- mariner
- mars
- mass
- mass_transfer
- mass-luminosity_relation
- matter
- menkar
- mensa
- mercury
- meridians
- mesa
- mesosphere
- messier_catalogue
- meteor_shower
- meteor_storm
- meteor_stream
- meteorite
- meteorite_craters
- meteoroid
- meteors
- metis
- microscopium
- milky_way
- millibar
- mimas
- minor_axis
- minor_planet
- mir
- mira
- mira_variable_stars
- mirak
- miranda
- mirfak
- mirror
- mizar
- molecular_clouds
- momentum
- monoceros
- mons
- moon
- morning_star
- mounting
- m-type_asteroids
- multiple_star_system
- musca_australis
- nadir
- naiad
- naked-eye_object
- nasa
- nearside
- nebula
- nemesis_theory
- neptune
- neptunes_satellites
- nereid
- neutrino
- neutron
- neutron_star
- new_general_catalogue
- new_moon
- newton
- newtonian_telescope
- ngc
- nodes
- norma
- north_polar_distance
- north_star
- northern_cross
- northern_lights
- nova
- nuclear_fusion
- nutation
- oberon
- object_glass
- objective_prism
- obliquity
- observatory
- occultation
- octans
- olbers_paradox
- old
- oljato_-_2201
- oort_cloud
- open_cluster
- ophelia
- ophiuchus
- opposition
- optics
- orbit
- orion
- orion_nebula
- orrery
- ozone
- ozone_layer
- pallas
- pan
- pandora
- parabola
- parallax
- parsec
- pasiphae
- patera
- pavo
- peculiar_stars
- pegasus
- penumbra
- periapsis
- periastron
- pericentre
- perigee
- perihelion
- periodic_comet
- period-luminosity_relation
- perseus
- perturb
- phaethon
- phase_angle
- pherkad
- phobos
- phoebe
- phoenix
- photometry
- photon
- photosphere
- pictor
- pisces
- piscis_australis
- planet
- planet_x_
- planetarium
- planetary_nebula
- planisphere
- planitia
- plasketts_star
- plasma
- pleiades
- pleione
- pluto
- polaris
- polarisation
- polarised_light
- pole_star
- pollux
- porrima
- portia
- praesepe
- precambrian
- precession
- precession_of_the_equinoxes
- pre-imbrian_period
- prime_meridian
- principia
- prism
- procyon
- prometheus
- prominence
- proper_motion
- proteus
- proton
- proton-proton_reaction
- protoplanet
- protostar
- proxima_centauri
- ptolemaic_system
- ptolemy
- puck
- pulsars
- pulsating_stars
- puppis
- pyxis
- quadrant
- quadrature
- quantum_mechanics
- quark
- quasar
- quasi-stellar_objects
- quiet_sun
- ra
- radar_astronomy
- radiant
- radio_astronomy
- radio_emission
- radio_galaxies
- radio_source
- radio_telescope
- recurrent_nova
- red_dwarf
- red_giant
- red_spot
- red_shift
- reflection_nebula
- refraction
- regio
- regolith
- regulus
- relativity
- resolution
- resonance
- retardation
- reticulum
- retrograde
- rgo
- rhea
- rift
- rift_valley
- rigel
- right_ascension
- rosalind
- royal_greenwich_observatory
- sagitta
- sagittarius
- sagittarius_a
- saturn
- saturns_rings
- saturns_satellites
- schmidt_camera
- schmidt_telescope
- scorpius
- sculptor
- scutum
- seeing
- selenography
- semimajor_axis
- semiregular_variable_stars
- serpens
- seti
- setting_circles
- seven_sisters
- sextans
- sextant
- seyfert_galaxies
- sheliak
- shepherd
- shield_volcano
- shooting_star
- sickle
- sidereal_month
- sidereal_time
- sigma_octantis
- sirius
- solar_apex
- solar_cycle
- solar_day
- solar_maximum
- solar_minimum
- solar_radiation
- solar_system
- solar_time
- solar_wind
- solstice
- space
- space_age
- space_exploration
- speckle_interferometry
- spectral_class
- spectral_line
- spectroscopic_binary
- spectroscopy
- spectrum
- speculum
- spheroid
- spica
- star
- star_atlas
- starburst_galaxy
- starspots
- steady-state_theory
- stellar_classification
- stellar_evolution
- stellar_nomenclature
- stellar_parallax
- stellar_population
- stellar_spectrum
- su_ursae_majoris_stars
- subgiant
- sun
- sundial
- sunspots
- supercluster
- supergiant
- superior_planets
- supernova
- t_tauri_stars
- taurus
- telescope
- telescopium
- telesto
- terminator
- terra
- terrestrial_coordinates
- terrestrial_planets
- tethys
- thalassa
- thebe
- theodolite
- thuban
- tidal_force
- tides
- time
- time_zone
- titan
- titania
- titius-bode_law
- transit
- transit_circle
- triangulum
- triangulum_australe
- triangulum_galaxy
- triton
- trojans
- tropical_month
- troposphere
- tucana
- twilight
- u_geminorum_stars
- ultraviolet_astronomy
- ulysses
- umbra
- umbriel
- undae
- universal_time
- universe
- uranus_rings
- uranus_satellites
- ursa_major
- ursa_minor
- vail_nebula
- van_allen_belts
- variable_star
- vega
- vela
- venera
- vent
- venus
- vernal_equinox
- very_large_array
- vesta
- viking
- virgo
- virgo_cluster_of_galaxies
- visual_binary
- visual_magnitude
- volans
- voyager
- vulpecula
- vulpecula
- w_ursae_majoris_stars
- w_virginis_stars
- waning
- waxing
- wedge
- white_dwarf
- white_hole
- wolf-rayet_stars
- xi_bootis
- xi_scorpii
- x-ray
- x-ray_astronomy
- x-ray_binary
- young
- z_camelopardalis_stars
- zenith
- zenith_distance
- zenith_tube
- zenithal_hourly_rate
- zodiac
- zodiacal_light
-