The parts of the key words in brackets are for reference only and should be omitted when the key words are entered on the manuscript. The word individual is meant for use with a specific astronomical object. A maximum of six key words is allowed.

General

• editorials, notices
• errata, addenda
• extraterrestrial intelligence
• history and philosophy of astronomy
• miscellaneous
• obituaries, biographies

Physical data and processes

• acceleration of particles
• accretion, accretion discs
• astrobiology
• astrochemistry
• atomic data
• atomic processes
• black hole physics
• conduction
• convection
• dense matter
• diffusion
• elementary particles
• equation of state
• gravitation
• gravitational lensing
• gravitational waves
• hydrodynamics
• instabilities
• line: formation
• line: identification
• line: profiles
• magnetic fields
• (magnetohydrodynamics) MHD
• masers
• molecular data
• molecular processes
• neutrinos
• nuclear reactions, nucleosynthesis, abundances
• plasmas
• polarization
• radiation mechanisms: general
• radiation mechanisms: non-thermal
• radiation mechanisms: thermal
• radiative transfer
• relativity
• scattering
• shock waves
• stellar dynamics
• turbulence
• waves

Astronomical instrumentation, methods and techniques

• atmospheric effects
• balloons
• instrumentation: adaptive optics
• instrumentation: detectors
• instrumentation: high angular resolution
• instrumentation: interferometers
• instrumentation: miscellaneous
• instrumentation: photometers
• instrumentation: polarimeters
• instrumentation: spectrographs
• light pollution
• methods: analytical
• methods: data analysis
• methods: laboratory
• methods: miscellaneous
• methods: N-body simulations
• methods: numerical
• methods: observational
• methods: statistical
• site testing
• space vehicles: instruments
• techniques: high angular resolution
• techniques: image processing
• techniques: interferometric
• techniques: miscellaneous
• techniques: photometric
• techniques: polarimetric
• techniques: radar astronomy
• techniques: radial velocities
• techniques: spectroscopic
• telescopes

Astronomical data bases

• astronomical data bases: miscellaneous
• atlases
• catalogues
• surveys

Astrometry and celestial mechanics

• astrometry
• celestial mechanics
• eclipses
• ephemerides
• occultations
• reference systems
• time

The Sun

• Sun: abundances
• Sun: activity
• Sun: atmosphere
• Sun: atmospheric motions
• Sun: chromosphere
• Sun: corona
• Sun: coronal mass ejections (CMEs)
• Sun: evolution
• Sun: faculae, plages
• Sun: filaments
• Sun: flares
• Sun: fundamental parameters
• Sun: general
• Sun: granulation
• Sun: helioseismology
• Sun: infrared
• Sun: interior
• Sun: magnetic fields
• Sun: oscillations
• Sun: particle emission
• Sun: photosphere
• Sun: prominences
• Sun: radio radiation
• Sun: rotation
• (Sun:) solar-terrestrial relations
• (Sun:) solar wind
• (Sun:) sunspots
• Sun: transition region
• Sun: UV radiation
• Sun: X-rays, gamma-rays

Solar system

• comets: general
• comets: individual:...
• Earth
• interplanetary medium
• Kuiper Belt
• meteors, meteoroids
• minor planets, asteroids
• Moon
• Oort Cloud
• planets: rings
• planets and satellites: formation
• planets and satellites: general
• planets and satellites: individual:...
• Solar system: formation
• Solar system: general

Stars

• stars: abundances
• stars: activity
• stars: AGB and post-AGB
• stars: atmospheres
• (stars:) binaries (including multiple): close
• (stars:) binaries: eclipsing
• (stars:) binaries: general
• (stars:) binaries: spectroscopic
• (stars:) binaries: symbiotic
• (stars:) binaries: visual
• (stars:) blue stragglers
• stars: carbon
• stars: chemically peculiar
• stars: chromospheres
• (stars:) circumstellar matter
• stars: coronae
• stars: distances
• stars: dwarf novae
• stars: early-type
• stars: emission-line, Be
• stars: evolution
• stars: flare
• stars: formation
• stars: fundamental parameters (classification, colours, luminosities, masses, radii, temperatures, etc.)
• stars: general
• (stars:) Hertzsprung-Russell (HR) diagram
• stars: horizontal branch
• stars: imaging
• stars: individual:...
• stars: interiors
• stars: kinematics
• stars: late-type
• stars: low-mass, brown dwarfs
• stars: luminosity function, mass function
• stars: magnetic fields
• stars: mass-loss
• stars: neutron
• (stars:) novae, cataclysmic variables
• stars: oscillations (including pulsations)
• (stars:) planetary systems
• (stars:) planetary systems: formation
• (stars:) planetary systems: protoplanetary discs
• stars: Population II
• stars: pre-main-sequence
• (stars:) pulsars: general
• (stars:) pulsars: individual:...
• stars: rotation
• stars: spots
• stars: statistics
• (stars:) subdwarfs
• (stars:) supergiants
• (stars:) supernovae: general
• (stars:) supernovae: individual:...
• (stars: variables:) Cepheids
• (stars: variables:) δ Scuti
• stars: variables: other
• (stars:) white dwarfs
• stars: winds, outflows
• stars: Wolf-Rayet

Interstellar medium (ISM), nebulae

• ISM: abundances
• ISM: atoms
• ISM: bubbles
• ISM: clouds
• (ISM:) cosmic rays
• (ISM:) dust, extinction
• ISM: evolution
• ISM: general
• ISM: globules
• (ISM:) HII regions
• ISM: Herbig-Haro objects
• ISM: individual:... (except planetary nebulae)
• ISM: jets and outflows
• ISM: kinematics and dynamics
• ISM: lines and bands
• ISM: magnetic fields
• ISM: molecules
• (ISM:) planetary nebulae: general
• (ISM:) planetary nebulae: individual:...
• (ISM:) reflection nebulae
• ISM: structure
• (ISM:) supernova remnants

The Galaxy

• Galaxy: abundances
• Galaxy: bulge
• Galaxy: centre
• Galaxy: disc
• Galaxy: evolution
• Galaxy: formation
• Galaxy: fundamental parameters
• Galaxy: general
• (Galaxy:) globular clusters: general
• (Galaxy:) globular clusters: individual:...
• Galaxy: halo
• Galaxy: kinematics and dynamics
• Galaxy: nucleus
• (Galaxy:) open clusters and associations: general
• (Galaxy:) open clusters and associations: individual:...
• (Galaxy:) solar neighbourhood
• Galaxy: stellar content
• Galaxy: structure

Galaxies

• galaxies: abundances
• galaxies: active
• (galaxies:) BL Lacertae objects: general
• (galaxies:) BL Lacertae objects: individual:...
• galaxies: bulges
• galaxies: clusters: general
• galaxies: clusters: individual:...
• (galaxies:) cooling flows
• galaxies: distances and redshifts
• galaxies: dwarf
• galaxies: elliptical and lenticular, cD
• galaxies: evolution
• galaxies: formation
• galaxies: fundamental parameters
• (classification, colours, luminosities, masses, radii, etc.)
• galaxies: general
• galaxies: haloes
• galaxies: high-redshift
• galaxies: individual:...
• galaxies: interactions
• (galaxies:) intergalactic medium
• galaxies: ISM
• galaxies: irregular
• galaxies: jets
• galaxies: kinematics and dynamics
• (galaxies:) Local Group
• galaxies: luminosity function, mass function
• (galaxies:) Magellanic Clouds
• galaxies: magnetic fields
• galaxies: nuclei
• galaxies: peculiar
• galaxies: photometry
• (galaxies:) quasars: absorption lines
• (galaxies:) quasars: emission lines
• (galaxies:) quasars: general
• (galaxies:) quasars: individual:...
• galaxies: Seyfert
• galaxies: spiral
• galaxies: starburst
• galaxies: star clusters
• galaxies: statistics
• galaxies: stellar content
• galaxies: structure

Cosmology

• (cosmology:) cosmic microwave background
• (cosmology:) cosmological parameters
• cosmology: miscellaneous
• cosmology: observations
• cosmology: theory
• (cosmology:) dark matter
• (cosmology:) diffuse radiation
• (cosmology:) distance scale
• (cosmology:) early Universe
• (cosmology:) large-scale structure of Universe

Sources as a function of wavelength

• gamma-rays: bursts
• gamma-rays: observations
• gamma-rays: theory
• infrared: galaxies
• infrared: general
• infrared: ISM
• infrared: Solar system
• infrared: stars
• radio continuum: galaxies
• radio continuum: general
• radio continuum: ISM
• radio continuum: Solar system
• radio continuum: stars
• radio lines: galaxies
• radio lines: general
• radio lines: ISM
• radio lines: Solar system
• radio lines: stars
• submillimetre
• ultraviolet: galaxies
• ultraviolet: general
• ultraviolet: ISM
• ultraviolet: Solar system
• ultraviolet: stars
• X-rays: binaries
• X-rays: bursts
• X-rays: diffuse background
• X-rays: galaxies
• X-rays: galaxies: clusters
• X-rays: general
• X-rays: individual:...
• X-rays: ISM
• X-rays: stars