- absolute magnitude
- absolute zero
- albedo
- apparent magnitude
- armillary sphere
- astrobiology
- astrolabe
- astrology
- astrometeorology
- astrometric binary
- astrometry
- astronomer
- astronomical unit
- astronomy
- astrophotography
- astrophysics
- AU
- big bang model
- big crunch
- binary accretion model
- Bodes law
- Cassegrain reflector
- celestial mechanics
- Chandrasekhar limit
- chaos
- coelostat
- Copernican system
- coronagraph
- cosmogony
- cosmological principle
- cosmology
- cosmos
- coude telescope
- dispersion
- Doppler shift
- eccentricity
- ephemeris
- epicycle
- epoch
- ether
- expanding universe
- Galilean telescope
- Geiger counter
- Geiger-Muller tube
- Geocentric
- gnomon
- gravitational lensing
- gravity anomaly
- harmonic law
- heliocentric
- Hertzsprung-Russell diagram
- horizon system
- horoscope
- Hubble classification scheme
- image-intensifier tube
- interferometer
- Keplers laws
- light speed
- light hear
- magnitude
- main sequence
- major axis
- mascon
- mass-luminosity law
- mass spectrometry
- monochromator
- New General Catalogue
- Newtonian reflector
- Newtons first law of motion
- Newtons law of universal gravitation
- Newtons second law of motion
- Newtons third law of motion
- NGC
- no boundary condition
- objective
- observable
- universe
- observatory
- orrery
- parallax
- parasec
- period
- period-luminosity relation
- photometry
- photomultiplier tube
- planetarium
- planetesimal
- plate tectonics
- Ptolemaic system
- pulsating universe theory
- quintessence
- radial velocity
- radio astronomy
- radio beam
- radio telescope
- reflector
- refractor
- right ascension
- roche limit
- Schmidt telescope
- Schwarzschild radius
- seismometer
- SETI
- sextant
- sideread
- sidereal period
- sidereal time
- signal-to-noise ratio
- singularity
- space-time
- space velocity
- spectral type
- spectrograph
- spectroheliograph
- spectroscopic parallax
- spectroscopy
- spectrum-luminosity diagram
- stargazing
- steady state model
- supermassive black hole
- telescope
- universe
- unanography
- unanology
- unanometry
- Very Large Array
- VLA
- white hole
- Widmanstaffen figures
- X-ray burster
- zodiac
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Astronomy and Space Science Branches, Laws, Theories, and Techniques
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