90.	GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS (for more detailed headings, see the Geophysics Appendix)
	91.	Solid Earth physics
	91.10.-v	Geodesy and gravity (see also 91.50.Kx Gravity and isostasy—in Marine geology and geophysics; 91.45.gh—in Geophysics Appendix)
	91.10.By	Mathematical geodesy; general theory
	91.10.Da	Cartography
	91.10.Fc	Space and satellite geodesy; applications of global positioning systems
	91.10.Jf	Topography; geometric observations
	91.10.Kg	Crustal movements and deformation
	91.10.Lh	Photogrammetry
	91.10.Nj	Rotational variations; polar wobble (see also 92.10.Iv Ocean influence of Earth's rotation)
	91.10.Op	Gravity anomalies; time variable gravity
	91.10.Pp	Geodetic techniques; gravimetric measurements and instruments
	91.10.Qm	Harmonics of the gravity potential field; geopotential theory and determination
	... ... ...	Rheology of lithosphere and mantle, see 91.32.De, 91.32.Gh
	91.10.Sp	Satellite orbits
	91.10.Tq	Earth tides
	91.10.Vr	Ocean/Earth/atmosphere/ hydrosphere/cryosphere interactions; mass balance
	91.10.Ws	Reference systems
	91.10.Xa	Global change from geodesy
	91.25.-r	Geomagnetism and paleomagnetism; geoelectricity (see also 91.50.Iv Marine magnetics and electromagnetics)
	91.25.Cw	Origins and models of the magnetic field; dynamo theories
	91.25.Dx	Archeomagnetism
	91.25.Ey	Interactions between exterior sources and interior properties
	91.25.F-	Rock and mineral magnetism (see also 91.60.Pn Magnetic and electrical properties—in Physical properties of rocks and minerals)
	91.25.fa	Biogenic magnetic minerals
	91.25.fd	Environmental magnetism
	91.25.G-	Spatial variations in geomagnetism
	91.25.ga	Harmonics and anomalies
	91.25.gj	Attributed to seafloor spreading
	91.25.Le	Time variations in geomagnetism
	91.25.Mf	Magnetic field reversals: process and timescale
	91.25.Ng	Paleomagnetism
	91.25.Ph	Magnetostratigraphy
	91.25.Qi	Geoelectricity, electromagnetic induction, and telluric currents
	91.25.Rt	Magnetic anomalies; modeling and interpretations
	91.25.St	Magnetic fabrics and anisotropy
	91.25.Th	Reference fields: regional; global
	91.25.Ux	Remagnetization
	91.25.Wb	Geomagnetic induction
	91.25.Xg	Geomagnetic excursion
	91.25.Za	Core processes
	91.30.-f	Seismology
	91.30.Ab	Theory and modeling, computational seismology
	91.30.Bi	Seismic sources (mechanisms, magnitude, moment frequency spectrum)
	91.30.Cd	Body wave propagation
	91.30.Dk	Seismicity (see also 91.45.gd—in Geophysics Appendix)
	91.30.Fn	Surface waves and free oscillations
	91.30.Ga	Subduction zones (see also 91.40.Rs—in Volcanology; 91.45.Hc—in Tectonophysics; 91.50.Wy—in Marine geology and geophysics; 91.67.fc—in Geophysics Appendix)
	91.30.Hc	Mid-ocean ridges (see also 91.40.St—in Volcanology; 91.50.Rt—in Marine geology and geophysics; 91.67.ff—in Geophysics Appendix)
	91.30.Iv	Transform faults
	91.30.Jk	Tomography in seismology (see also 91.35.Pn Tomography of the Earth's interior)
	91.30.Mv	Strong motions and shock waves
	91.30.Nw	Tsunamis (see also 92.10.hl—in Geophysics Appendix)
	91.30.Px	Earthquakes
	91.30.Rz	Nuclear explosion seismology
	91.30.Tb	Volcano seismology
	91.30.Uv	Core and mantle seismology
	91.30.Vc	Continental crust seismology
	91.30.Wx	Lithosphere seismology (see also 91.45.gf—in Geophysics Appendix)
	91.30.Ye	Oceanic crust seismology
	91.30.Za	Paleoseismology
	91.32.-m	Rheology of the Earth
	91.32.Ac	General aspects
	91.32.De	Crust and lithosphere
	91.32.Gh	Mantle
	91.32.Jk	Friction of fault zones
	91.35.-x	Earth's interior structure and properties
	91.35.Cb	Models of interior structure
	91.35.Dc	Heat flow; geothermy (see also 91.50.Ln Heat flow (benthic)—in Marine geology and geophysics)
	91.35.Ed	Structure of the Earth's interior below the upper mantle
	91.35.Gf	Structure of the crust and upper mantle
	91.35.Lj	Composition and state of the Earth's interior (see also 91.67.gb—in Geophysics Appendix)
	... ... ...	Geochronology, see 91.80.+d; and in Geophysics Appendix, see 91.80.−d)
	91.35.Pn	Tomography of the Earth's interior (see also 91.30.Jk Tomography in seismology)
	91.40.-k	Volcanology (see also 91.30.Tb Volcano seismology)
	91.40.Ac	Geochemical modeling
	91.40.Bp	Tephrochronology; ash deposits
	91.40.Dr	Atmospheric effects (see also 92.60.Mt Particles and aerosols—in Meteorology)
	91.40.Ft	Eruption mechanisms
	91.40.Ge	Hydrothermal systems (see also 91.67.Jk—in Geochemistry; 92.05.Lf—in oceanography)
	91.40.Hw	Lava rheology and morphology
	91.40.Jk	Magma migration
	91.40.La	Physics and chemistry of magma bodies
	91.40.Pc	Thermodynamics in volcanology
	91.40.Qa	Reactions and phase equilibria (see also 91.67.De—in Geochemistry)
	91.40.Rs	Subduction zone processes (see also 91.30.Ga—in Seismology; 91.45.Hc—in Tectonophysics; 91.50.Wy—in Marine geology; 91.67.fc—in Geophysics Appendix)
	91.40.St	Mid-oceanic ridge processes (see also 91.30.Hc—in Seismology; 91.50.Rt—in Marine geology; 91.67.ff—in Geophysics Appendix)
	91.40.Ta	Intra-plate processes (see also 91.50.Tb—in Marine geology; 91.67.fh—in Geophysics Appendix)
	91.40.Uc	Volcanoclastic deposits
	91.40.Vg	Volcanic gases
	91.40.Wx	Calderas
	91.40.Yt	Remote sensing of volcanoes (see also 93.85.Pq)
	91.40.Zz	Volcano monitoring; volcanic hazards and risks
	... ... ...	Planetary volcanism, see 96.12.Xy
	91.45.-c	Tectonophysics
	91.45.Bg	Planetary interiors (see also 96.12.Pc—in Planetology of solid surface planets; 96.15.Nd—in Planetology of fluid planets)
	91.45.Cg	Continental tectonics
	91.45.Dh	Plate tectonics
	... ... ...	Neotectonics, see 91.45.ch—in Geophysics Appendix
	91.45.Fj	Convection currents and mantle plumes
	91.45.Ga	Dynamics and mechanics of tectonics
	91.45.Hc	Subduction and obduction zone processes (see also 91.30.Ga—in Seismology; 91.40.Rs—in Volcanology)
	91.45.Jg	Hot spots, large igneous provinces, and flood basalt volcanism
	91.45.Kn	Core processes
	91.45.Nc	Evolution of the Earth
	91.45.Qv	Tomography of plate tectonics (see also 91.30.Jk—in Seismology)
	91.45.Rg	Heat generation and transport
	... ... ...	Folds and folding, see 91.55.Hj
	... ... ...	Fractures and faults, see 91.55.Jk
	91.45.Wa	Volcanic arcs
	91.45.Xz	Stresses in tectonophysics
	... ... ...	Hydrothermal systems, see 91.40.Ge
	... ... ...	Planetary tectonics, see 96.12.Xy
	... ... ...	Pluton emplacement, see 91.55.Sn
	... ... ...	Rheology of the Earth, see 91.32.−m
	91.50.-r	Marine geology and geophysics
	91.50.Ac	Back-arc basin processes
	91.50.Bd	Continental shelf and slope processes
	91.50.Cw	Beach and coastal processes
	91.50.Ey	Seafloor morphology, geology, and geophysics (see also 92.10.Oc Benthic boundary layers, ocean bottom processes—in oceanography)
	91.50.Ga	Bathymetry, seafloor topology
	91.50.Hc	Gas and hydrate systems (see also 92.20.Uv—in oceanography)
	91.50.Iv	Marine magnetics and electromagnetics
	91.50.Jc	Marine sediments, turbidity currents—processes and transport (see also 91.65.Ti—in petrology; 91.67.Ty—in Geochemistry; 92.10.Wa and 92.20.Vn—in oceanography; 92.40.Gc—in hydrology; 91.80.Wx—in Geophysics Appendix)
	91.50.Kx	Gravity and isostasy
	91.50.Ln	Heat flow (benthic)
	91.50.Nc	Littoral processes
	91.50.Ps	Marine hydrogeology
	91.50.Qr	Micropaleontology
	91.50.Rt	Mid-ocean ridge processes (see also 91.30.Hc—in Seismology; 91.40.St—in Volcanology; 91.67.ff—in Geophysics Appendix)
	91.50.Sn	Ocean drilling (see also 93.85.Tf Oil prospecting, pipelines, and conduits)
	91.50.Tb	Oceanic hotspots and intra-plate volcanism (see also 91.40.Ta—in Volcanology; 91.67.fh—in Geophysics Appendix)
	91.50.Uv	Oceanic plateaus and fracture zone processes
	91.50.Vx	Ophiolites
	91.50.Wy	Subduction zone processes
	91.50.Xz	Submarine landslides
	91.50.Yf	Submergence instruments, ROV, AUV, Submersibles, and ocean observatories
	91.55.-y	Structural geology
	91.55.Ax	Mechanics, theory and modeling
	91.55.Bc	Continental neotectonics
	91.55.De	Diapir and diapirism
	91.55.Fg	Dynamics and mechanics of faulting (see also 91.32.Jk Friction of fault zones, rheology of)
	91.55.Hj	Folds and folding
	91.55.Jk	Fractures and faults (see also 91.50.Uv Oceanic plateaus and fracture zone processes)
	91.55.Ln	Kinematics of crustal and mantle deformation
	91.55.Mb	High strain deformation zones
	91.55.Nc	Local crustal structure; regional crustal structure
	91.55.Pq	Melanges
	91.55.Qr	Mesoscopic fabrics
	91.55.Sn	Pluton emplacement
	91.55.Tt	Role of fluids
	91.55.Uv	Remote sensing in structural geology
	... ... ...	Rheology of the Earth, see 91.32.−m
	91.60.-x	Physical properties of rocks and minerals (for rheological properties of geological materials, see 83.80.Nb)
	91.60.Ba	Elasticity, fracture, and flow
	91.60.Dc	Plasticity, diffusion, and creep
	91.60.Ed	Crystal structure and defects, microstructure
	91.60.Fe	Equations of state
	91.60.Gf	High-pressure behavior
	91.60.Hg	Phase changes
	91.60.Ki	Thermal properties
	91.60.Lj	Acoustic properties
	91.60.Mk	Optical properties
	91.60.Np	Permeability and porosity
	91.60.Pn	Magnetic and electrical properties (see also 91.25.F− Rock and mineral magnetism)
	... ... ...	Environmental magnetism, see 91.25.fd
	91.60.Qr	Wave attenuation
	91.60.Tn	Transport properties
	91.62.+g	Biogeosciences (see also 91.67.Uv Organic and biogenic geochemistry; 92.20.Jt Biology of the ocean; 91.80.Kc—in Geophysics Appendix)
	91.65.-n	Mineralogy and petrology
	91.65.An	Mineral and crystal chemistry
	... ... ...	Geochemical cycles, see 91.67.Nc
	91.65.Cq	Igneous petrology
	91.65.Dt	Isotopic composition (see also 91.67.Qr Radiogenic isotope geochemistry; 91.67.Rx Stable isotope geochemistry)
	91.65.Ej	Extrusive structures and rocks
	... ... ...	Low temperature geochemistry, see 91.67.Vf
	91.65.Gk	Intrusive structures and rocks
	... ... ...	Organic geochemistry, see 91.67.Uv
	91.65.Jn	Layered magma chambers
	91.65.Kf	Metamorphic petrology
	91.65.Lc	Pressure-temperature-time paths
	91.65.My	Fluid flow
	... ... ...	Trace elements, see 91.67.Pq
	91.65.Pj	Ultra-high pressure metamorphism
	91.65.Qr	Ultra-high temperature metamorphism
	91.65.Rg	Mineral occurrences and deposits
	91.65.Sn	Meteorite mineralogy and petrology
	91.65.Ti	Sedimentary petrology (see also 91.50.Jc—in marine geology; 91.67.Ty—in Geochemistry; 92.10.Wa and 92.20.Vn—in oceanography; 92.40.Gc—in hydrology; 91.80.Wx—in Geophysics Appendix)
	... ... ...	Major element composition, see 91.67.Pq
	91.67.-y	Geochemistry (see also 92.20.Cm Chemistry of the ocean; 92.40.Bc Chemistry of fresh water; 92.60.Ls Ion chemistry of the atmosphere; 91.62.Kt, 91.80.Kc, and 92.20.C− in Geophysics Appendix)
	91.67.Bc	Geochemical modeling
	91.67.De	Reactions and phase equilibria (see also 91.40.Qa—in Volcanology)
	91.67.Fx	Geochemical processes
	91.67.Gy	Chemical composition
	91.67.Jk	Geochemistry of hydrothermal systems (see also 91.40.Ge—in Volcanology; 92.05.Lf—in oceanography)
	... ... ...	Physics and chemistry of magma bodies, see 91.40.La
	91.67.Nc	Geochemical cycles (see also 92.20.Sg Biogeochemical cycles—in oceanography; 92.60.hn—in meteorology; 92.30.Gh—in Geophysics Appendix)
	91.67.Pq	Major and trace element geochemistry (see also 92.20.Wx Trace elements—in chemical and biological oceanography)
	91.67.Qr	Radiogenic isotope geochemistry (see also 91.65.Dt Isotopic composition—in Mineralogy and petrology; 92.20.Td Radioactivity and radioisotopes—in oceanography)
	91.67.Rx	Stable isotope geochemistry (see also 91.65.Dt Isotopic composition—in Mineralogy and petrology)
	91.67.St	Fluid and melt inclusion geochemistry
	91.67.Ty	Sedimentary geochemistry (see also 91.50.Jc—in marine geology; 91.65.Ti—in Mineralogy and petrology; 92.10.Wa and 92.20.Vn—in oceanography; 92.40.Gc—in hydrology; 91.80.Wx—in Geophysics Appendix)
	91.67.Uv	Organic and biogenic geochemistry
	91.67.Vf	Low-temperature geochemistry
	91.70.-c	Information related to geologic time
	91.70.Bf	Cenozoic
	91.70.Dh	Mesozoic
	91.70.Fj	Paleozoic
	91.70.Hm	Precambrian
	91.80.+d	Geochronology (see also 92.30.Hj—in Geophysics Appendix)
	91.90.+p	Other topics in solid Earth physics (restricted to new topics in section 91)
	92.	Hydrospheric and atmospheric geophysics
	92.05.-x	General aspects of oceanography
	92.05.Bc	Analytical modeling and laboratory experiments
	92.05.Df	Climate and inter-annual variability (see also 92.60.Ry Climatology, climate change and variability—in meteorology; 92.70.Gt Climate dynamics—in Global change)
	92.05.Ek	Long term variability; Heinrich events
	92.05.Fg	Diurnal, seasonal and annual cycles
	92.05.Hj	Physical and chemical properties of seawater (salinity, density, temperature)
	92.05.Jn	Ocean energy extraction
	92.05.Lf	Hydrothermal systems (see also 91.40.Ge—in Volcanology; 91.67.Jk—in Geochemistry)
	92.10.-c	Physical oceanography
	92.10.A-	Circulation and currents
	92.10.ab	General circulation
	92.10.ad	Deep water formation and circulation
	92.10.af	Thermohaline convection
	92.10.ah	Ocean currents; Eastern boundary currents, Western boundary currents
	92.10.ak	Eddies and mesoscale processes
	92.10.am	El Nino Southern Oscillation (see also 92.30.La—in Paleoceanography)
	... ... ...	Physical properties of seawater, see 92.05.Hj
	... ... ...	Capillary waves, see 92.10.hd—in Geophysics Appendix
	92.10.Dh	Deep ocean processes
	92.10.Ei	Coriolis effects
	92.10.Fj	Upper ocean and mixed layer processes
	92.10.Hm	Ocean waves and oscillations
	92.10.Iv	Ocean influence of Earth's rotation
	... ... ...	Seiches, see 92.10.hk—in Geophysics Appendix
	92.10.Kp	Sea–air energy exchange processes (see also 92.60.Cc—in meteorology)
	92.10.Lq	Turbulence, diffusion, and mixing processes in oceanography
	92.10.Ns	Fine structure and microstructure in oceanography
	92.10.Oc	Benthic boundary layers, ocean bottom processes (see also 91.50.Ey Sea floor, morphology, geology, and geophysics—in marine geology)
	92.10.Rw	Sea ice (mechanics and air/sea/ice exchange processes)
	92.10.Sx	Coastal, estuarine, and near shore processes (see also 91.50.Cw Beach and coastal processes—in marine geology)
	92.10.Ty	Fronts and jets
	92.10.Ua	Overflows
S	92.10.Vz	Underwater sound
M	92.10.Vz	Underwater sound (see also 43.30.+m in acoustics; 43.30.−k in Acoustics Appendix)
	92.10.Wa	Sediment transport (see also 91.50.Jc—in marine geology; 91.65.Ti—in Mineralogy and petrology; 91.67.Ty—in Geochemistry; 92.20.Vn—in chemical oceanography; 92.40.Gc—in Hydrology; 91.80.Wx—in Geophysics Appendix)
	92.10.Xc	Ocean fog
	92.10.Yb	Hydrography (for ocean parameter estimation by acoustical methods, see 43.30.Pc—in Acoustics Appendix)
	92.10.Zf	Upwelling and convergences (see also 92.30.Vn—in Geophysics Appendix)
	... ... ...	Marine geology and geophysics, see 91.50.−r
	92.20.-h	Chemical and biological oceanography
	92.20.Bk	Aerosols (see also 92.60.Mt—in meteorology; 91.67.gp and 92.30.Ef—in Geophysics Appendix)
	92.20.Cm	Chemistry of the ocean
	... ... ...	Photochemistry; photosynthesis, see 92.20.ch—in Geophysics Appendix
	... ... ...	Ocean energy extraction, see 92.05.Jn
	92.20.Hs	Anoxic environments (see also 91.62.+g Biogeosciences; 91.62.De—in Geophysics Appendix)
	92.20.Iv	Benthic processes, sea-bottom processes (see also 91.50.Ey—in marine geology; 92.10.Oc—in oceanography; 92.40.Gc—in hydrology)
	92.20.Jt	Biology of the ocean (see also 91.62.+g Biogeosciences; 92.40.vu Cryobiology—in Geophysics Appendix)
	92.20.Ny	Marine pollution
	92.20.Ox	Hypoxic environment (see also 91.62.De—in Geophysics Appendix)
	... ... ...	Bacteria, see 92.20.jb—in Geophysics Appendix
	... ... ...	Plankton, see 92.20.jf and 92.20.jh—in Geophysics Appendix
	92.20.Sg	Biogeochemical cycles (see also 91.67.Nc—in Geochemistry; 92.60.hn—in meteorology; 92.30.Gh—in Geophysics Appendix)
	92.20.Td	Radioactivity and radioisotopes (see also 91.65.Dt Isotopic composition—in Mineralogy and petrology; 91.67.Qr Radiogenic isotope geochemistry)
	92.20.Uv	Gases in chemical oceanography (see also 91.50.Hc Gas and hydrate systems—in marine geology)
	92.20.Vn	Sedimentation (see also 91.50.Jc—in marine geology; 91.65.Ti—in petrology; 91.67.Ty—in Geochemistry; 92.10.Wa—in oceanography; 92.40.Gc—in hydrology; 91.80.Wx—in Geophysics Appendix)
	92.20.Wx	Trace elements (see also 91.67.Pq Major and trace element geochemistry)
	92.20.Xy	Carbon cycling (see also 91.62.La—in Geophysics Appendix)
	92.30.+m	Paleoceanography
	92.40.-t	Hydrology and glaciology; cryosphere (see also 92.70.Ha—in Global change)
	92.40.Aa	Anthropogenic effects (see also 92.30.De—in Geophysics Appendix)
	92.40.Bc	Chemistry of fresh water
	92.40.Cy	Modeling; general theory
	92.40.De	Drought
	92.40.Ea	Precipitation (see also 92.60.jf—in Geophysics Appendix)
	... ... ...	Rivers, runoff, and stream flow, see 92.40.qh and 92.40.qp—in Geophysics Appendix
	92.40.Gc	Erosion and sedimentation; sediment transport (see also 91.50.Jc—in marine geology; 91.65.Ti—in Mineralogy and petrology; 91.67.Ty—in Geochemistry; 92.10.Wa and 92.20.Vn—in oceanography; 91.80.Wx—in Geophysics Appendix)
	92.40.Ha	Debris flow and landslides
	92.40.Iv	Desertification
	92.40.Je	Evapotranspiration (see also 92.60.jc Evaporation—in Geophysics Appendix)
	92.40.Kf	Groundwater
	92.40.Lg	Soil moisture and temperature
	... ... ...	Limnology, see 92.40.qj—in Geophysics Appendix
	92.40.Oj	Eco-hydrology; plant ecology
	92.40.Pb	Geomorphology
	92.40.Qk	Surface water, water resources
	... ... ...	Water quality, see 92.40.kc and 92.40.qc—in Geophysics Appendix
	... ... ...	Snow, see 92.40.ed—in Geophysics Appendix
	92.40.Vq	Glaciology (see also 92.30.Mc—in Geophysics Appendix)
	... ... ...	Ice, see 92.40.vx—in Geophysics Appendix
	92.40.We	Hydrologic cycles and budgets
	92.40.Xx	Irrigation; dams
	92.40.Yy	Wetlands
	92.40.Zg	Hydrometeorology, hydroclimatology
	92.60.-e	Properties and dynamics of the atmosphere; meteorology (see also 92.40.Zg Hydrometeorology, hydroclimatology)
	92.60.Aa	Modeling and model calibration (see also 92.70.Np Global climate modeling)
	92.60.Bh	General circulation
	92.60.Cc	Ocean/atmosphere interactions, air/sea constituent fluxes (see also 92.10.Kp—in oceanography)
	92.60.Fm	Boundary layer structure and processes
	92.60.Gn	Winds and their effects
	92.60.H-	Atmospheric composition, structure, and properties
	92.60.ha	Exospheric composition and chemistry
	92.60.hb	Thermospheric composition and chemistry, energy deposition
	92.60.hc	Mesospheric composition, energy deposition, constituent transport and chemistry
	92.60.hd	Stratospheric composition and chemistry
	92.60.hf	Tropospheric composition and chemistry, constituent transport and chemistry
	92.60.hg	Constituent sources and sinks
	92.60.hh	Acoustic gravity waves, tides, and compressional waves
	92.60.hk	Convection, turbulence, and diffusion (see also 92.30.Ef—in Geophysics Appendix)
	92.60.hn	Geochemical cycles (see also 91.67.Nc—in Geochemistry; 92.20.Sg—in oceanography; 92.30.Gh—in Geophysics Appendix)
	92.60.hv	Pressure, density, and temperature
	92.60.hw	Airglow and aurorae (see also 94.20.Ac Auroral ionosphere; 94.30.Aa Auroral phenomena in magnetosphere)
	92.60.hx	Other upper atmospheric phenomena: red sprites; blue jets; atmospheric gamma ray and intense VHF emissions
	92.60.Iv	Paleoclimatology (see also 92.70.Gt Climate dynamics—in Global change)
	92.60.Jq	Water in the atmosphere
	92.60.Kc	Land/atmosphere interactions
	92.60.Ls	Ion chemistry of the atmosphere
	92.60.Mt	Particles and aerosols (see also 92.20.Bk—in oceanography; 91.67.gp and 92.30.Ef—in Geophysics Appendix)
	92.60.Nv	Cloud physics and chemistry
	92.60.Ox	Tropical meteorology
	92.60.Pw	Atmospheric electricity, lightning
	92.60.Qx	Storms
	92.60.Ry	Climatology, climate change and variability (see also 92.70.Gt and 92.70.Kb—in Global change; 92.30.Bc—in Geophysics Appendix)
	92.60.Sz	Air quality and air pollution (see also 07.88.+y Instruments for environmental pollution measurements)
	92.60.Ta	Electromagnetic wave propagation
	92.60.Uy	Polar meteorology
	92.60.Vb	Radiative processes, solar radiation
	92.60.Wc	Weather analysis and prediction
	92.60.Xg	Stratosphere/troposphere interactions
	92.60.Zc	Volcanic effects
	92.70.-j	Global change
	92.70.Aa	Abrupt/rapid climate change
	92.70.Bc	Land/atmosphere interactions
	92.70.Cp	Atmosphere
	92.70.Er	Biogeochemical processes
	92.70.Gt	Climate dynamics (see also 92.60.Ry—in meteorology; 92.30.Bc—in Geophysics Appendix)
	92.70.Ha	Cryospheric change
	92.70.Iv	Geomorphology and weathering (see also 92.40.Gc Erosion and sedimentation; sediment transport; 92.40.Pb—in hydrology; 92.40.P− in Geophysics Appendix)
	92.70.Jw	Oceans, sea level change (see also 92.10.hp—in Geophysics Appendix)
	92.70.Kb	Regional climate change (see also 92.60.Ry—in meteorology; 92.30.Bc—in Geophysics Appendix)
	92.70.Ly	Water cycles
	92.70.Mn	Impacts of global change; global warming (see also 92.30.Np—in Geophysics Appendix)
	92.70.Np	Global climate modeling
	92.70.Pq	Earth system modeling
	92.70.Qr	Solar variability impact
	92.70.St	Land cover change
	92.90.+x	Other topics in hydrospheric and atmospheric geophysics (restricted to new topics in section 92)
	93.	Geophysical observations, instrumentation, and techniques
	93.30.-w	Information related to geographical regions
	93.30.Bz	Africa
	93.30.Ca	Antarctica
	93.30.Db	Asia
	93.30.Fd	Australia
	93.30.Ge	Europe
	93.30.Hf	North America
	93.30.Jg	South America
	93.30.Kh	Large islands (e.g., Greenland)
	93.30.Li	Arctic Ocean
	93.30.Mj	Atlantic Ocean
	93.30.Nk	Indian Ocean
	93.30.Pm	Pacific Ocean
	93.30.Qn	Southern Ocean
	93.30.Rp	Regional seas
	93.30.Sq	Polar regions
	93.30.Tr	Temperate regions
	93.30.Vs	Tropical regions
	93.55.+z	International organizations, national and international programs
	... ... ...	Data acquisition and storage, see 93.85.Bc
	93.85.-q	Instruments and techniques for geophysical research: Exploration geophysics (see also 91.50.Ga Bathymetry, seafloor topology; 91.50.Yf Submergence instruments, ROV, AUV, submersibles, and ocean observatories—in marine geology; 92.10.Yb Hydrography—in oceanography)
	93.85.Bc	Computational methods and data processing, data acquisition and storage
	93.85.De	Exploration of continental structures
	93.85.Fg	Downhole methods
	93.85.Hj	Gravity methods
	93.85.Jk	Magnetic and electrical methods
	93.85.Ly	Exploration of oceanic structures
	93.85.Np	Radioactivity methods
	93.85.Pq	Remote sensing in exploration geophysics (see also 91.40.Yt—in Volcanology; 91.55.Uv—in Structural geology)
	93.85.Rt	Seismic methods
	93.85.Tf	Oil prospecting, pipelines, and conduits (see also 91.50.Sn Ocean drilling)
	93.90.+y	Other topics in geophysical observations, instrumentation, and techniques (restricted to new topics in section 93)
	94.	Physics of the ionosphere and magnetosphere
	94.05.-a	Space plasma physics (see also 96.50.−e Interplanetary physics)
	94.05.Bf	Plasma interactions with dust and aerosols
	94.05.Dd	Radiation processes
	94.05.Fg	Solitons and solitary waves
	94.05.Hk	Spacecraft/atmosphere interactions
	94.05.Jq	Spacecraft sheaths, wakes, and charging
	94.05.Lk	Turbulence
	94.05.Pt	Wave/wave, wave/particle interactions
	94.05.Rx	Experimental techniques and laboratory studies (see also 52.72.+v—in physics of plasmas)
	94.05.Sd	Space weather
	... ... ...	Convection, diffusion, and turbulence, see 92.60.Hk
	... ... ...	Physics of the neutral atmosphere, see 92.60.−e
	... ... ...	Absorption and scattering of radiation, see 92.60.Ta and 92.60.Vb
	... ... ...	Acoustic gravity waves, tides, and compressional waves, see 92.60.hh
	... ... ...	Winds and their effects, see 92.60.Gn
	... ... ...	Cosmic dust, see 96.50.Dj and 98.38.Cp
S	94.20.-y	Physics of the ionosphere
M	94.20.-y	Physics of the ionosphere (for ionospheres of the planets, see 96.12.ji and 96.15.hk in Geophysics Appendix; for radiowave propagation, see 41.20.Jb—in electromagnetism)
	94.20.Ac	Auroral ionosphere (see also 92.60.hw Airglow and aurorae—in meteorology; 94.30.Aa Auroral phenomena in magnetosphere)
	94.20.Bb	Wave propagation (see also 94.30.Tz—in Physics of the magnetosphere)
	94.20.Cf	Ionospheric modeling and forecasting
	94.20.D-	Ionospheric structure, composition
	94.20.de	D region
	94.20.dg	E region
	94.20.dj	F region
	94.20.dk	Polar cap ionosphere
	94.20.dl	Topside region
	94.20.dm	Mid-latitude ionosphere
	94.20.dt	Equatorial ionosphere
	94.20.dv	Ion chemistry and composition; ionization mechanisms
	94.20.Fg	Plasma temperature and density
	... ... ...	Plasmasphere, see 94.30.cv
	94.20.Qq	Particle precipitation (see also 94.30.Ny—in Physics of the magnetosphere)
	... ... ...	Interactions between waves and particles, see 94.20.W−
	94.20.Ss	Electric fields; current system
	94.20.Tt	Ionospheric soundings; active experiments
	94.20.Vv	Ionospheric disturbances, irregularities, and storms
	94.20.W-	Ionospheric dynamics and interactions
	94.20.wc	Plasma motion; plasma convection; particle acceleration
	94.20.wf	Plasma waves and instabilities
	94.20.wg	Ionosphere/atmospheric interactions
	94.20.wh	Ionosphere/magnetosphere interactions
	94.20.wj	Wave/particle interactions
	94.20.wl	Plasma interactions with dust and aerosols
	94.20.wq	Solar radiation and cosmic ray effects
	94.20.ws	Electromagnetic wave propagation
	94.20.Xa	Meteor-trail physics
	94.30.-d	Physics of the magnetosphere
	94.30.Aa	Auroral phenomena in magnetosphere (see also 94.20.Ac Auroral ionosphere)
	94.30.Bg	Magnetospheric modeling and forecasting
	94.30.C-	Magnetospheric configuration and dynamics
	94.30.cb	Inner magnetosphere
	94.30.cf	Outer magnetosphere
	94.30.cg	Magnetospheric cusp
	94.30.ch	Magnetopause
	94.30.cj	Magnetosheath
	94.30.cl	Magnetotail
	94.30.cp	Magnetic reconnection
	94.30.cq	MHD waves, plasma waves, and instabilities
	94.30.cs	Plasma motion; plasma convection
	94.30.ct	Plasma sheet
	94.30.cv	Plasmasphere
	94.30.cx	Polar cap phenomena
	94.30.Hn	Energetic trapped particles
	94.30.Kq	Electric fields, field-aligned currents and current systems, and ring currents
	94.30.Lr	Magnetic storms, substorms
	94.30.Ms	Magnetic pulsations
	94.30.Ny	Energetic particle precipitation (see also 94.20.Qq—in Physics of the ionosphere)
	94.30.Tz	Electromagnetic wave propagation (see also 94.20.Bb—in Physics of the ionosphere)
	94.30.Va	Magnetosphere interactions
	94.30.Xy	Radiation belts
	94.80.+g	Instrumentation for space plasma physics, ionosphere, and magnetosphere
	94.90.+m	Other topics in space plasma physics, physics of the ionosphere and magnetosphere (restricted to new topics in section 94)
	95.	Fundamental astronomy and astrophysics; instrumentation, techniques, and astronomical observations
	95.10.-a	Fundamental astronomy
	95.10.Ce	Celestial mechanics (including n-body problems) (see also 45.50.Pk—in Classical mechanics of discrete systems)
	... ... ...	Dynamics and kinematics of stellar systems, see 98.10.+z
	95.10.Eg	Orbit determination and improvement
	95.10.Fh	Chaotic dynamics (see also 05.45.−a Nonlinear dynamics and chaos)
	95.10.Gi	Eclipses, transits, and occultations
	95.10.Jk	Astrometry and reference systems
	95.10.Km	Ephemerides, almanacs, and calendars
S	95.30.-k	Fundamental aspects of astrophysics
M	95.30.-k	Fundamental aspects of astrophysics (see also section 26 Nuclear astrophysics)
	95.30.Cq	Elementary particle processes
	95.30.Dr	Atomic processes and interactions
	95.30.Ft	Molecular and chemical processes and interactions
	95.30.Gv	Radiation mechanisms; polarization
	95.30.Jx	Radiative transfer; scattering
	95.30.Ky	Atomic and molecular data, spectra, and spectral parameters (opacities, rotation constants, line identification, oscillator strengths, gf values, transition probabilities, etc.)
	95.30.Lz	Hydrodynamics
	95.30.Qd	Magnetohydrodynamics and plasmas (see also 52.30.Cv and 52.72.+v—in physics of plasmas)
	95.30.Sf	Relativity and gravitation (see also section 04 General relativity and gravitation; 98.80.Jk Mathematical and relativistic aspects of cosmology)
	95.30.Tg	Thermodynamic processes, conduction, convection, equations of state
	95.30.Wi	Dust processes (condensation, evaporation, sputtering, mantle growth, etc.)
	95.35.+d	Dark matter (stellar, interstellar, galactic, and cosmological) (see also 95.30.Cq Elementary particle processes; for brown dwarfs, see 97.20.Vs; for galactic halos, see 98.35.Gi or 98.62.Gq; for models of the early Universe, see 98.80.Cq)
	95.36.+x	Dark energy (see also 98.80.−k Cosmology)
S	95.40.+s	Artificial Earth satellites
M	95.40.+s	Artificial Earth satellites (for lunar and planetary probes, see 95.55.Pe)
	95.45.+i	Observatories and site testing
S	95.55.-n	Astronomical and space-research instrumentation
M	95.55.-n	Astronomical and space-research instrumentation (see also 94.80.+g Instrumentation for space plasma physics, ionosphere, and magnetosphere)
	95.55.Aq	Charge-coupled devices, image detectors, and IR detector arrays (see also 85.60.Gz Photodetectors)
	95.55.Br	Astrometric and interferometric instruments
	95.55.Cs	Ground-based ultraviolet, optical and infrared telescopes
	95.55.Ev	Solar instruments
	95.55.Fw	Space-based ultraviolet, optical, and infrared telescopes
	95.55.Jz	Radio telescopes and instrumentation; heterodyne receivers
	95.55.Ka	X- and γ-ray telescopes and instrumentation
	95.55.Pe	Lunar, planetary, and deep-space probes
	95.55.Qf	Photometric, polarimetric, and spectroscopic instrumentation
	95.55.Rg	Photoconductors and bolometers
	95.55.Sh	Auxiliary and recording instruments; clocks and frequency standards
	95.55.Vj	Neutrino, muon, pion, and other elementary particle detectors; cosmic ray detectors (see also 29.40.−n Radiation detectors—in Nuclear physics)
S	95.55.Ym	Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques
M	95.55.Ym	Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques (see also 04.80.Nn Gravitational wave detectors and experiments in—General relativity and gravitation)
	95.75.-z	Observation and data reduction techniques; computer modeling and simulation
	95.75.De	Photography and photometry (including microlensing techniques)
	95.75.Fg	Spectroscopy and spectrophotometry
	95.75.Hi	Polarimetry
	95.75.Kk	Interferometry
	95.75.Mn	Image processing (including source extraction)
	95.75.Pq	Mathematical procedures and computer techniques
	95.75.Qr	Adaptive and segmented optics (see also 42.68.Wt Remote sensing; LIDAR and adaptive systems—in atmospheric optics)
	95.75.Rs	Remote observing techniques
S	95.75.Tv	Digitization techniques
M	95.75.Tv	Digitization techniques
	95.75.Wx	Time series analysis, time variability
	95.80.+p	Astronomical catalogs, atlases, sky surveys, databases, retrieval systems, archives, etc.
	95.85.-e	Astronomical observations (additional primary heading(s) must be chosen with these entries to represent the astronomical objects and/or properties studied)
	95.85.Bh	Radio, microwave (>1 mm)
	95.85.Fm	Submillimeter (300 μm–1 mm)
	95.85.Gn	Far infrared (10–300 μm)
	95.85.Hp	Infrared (3–10 μm)
	95.85.Jq	Near infrared (0.75–3 μm)
	95.85.Kr	Visible (390–750 nm)
	95.85.Ls	Near ultraviolet (300–390 nm)
	95.85.Mt	Ultraviolet (10–300 nm)
	95.85.Nv	X-ray
	95.85.Pw	γ-ray
	95.85.Ry	Neutrino, muon, pion, and other elementary particles; cosmic rays
	95.85.Sz	Gravitational radiation, magnetic fields, and other observations
	95.90.+v	Historical astronomy and archaeoastronomy; and other topics in fundamental astronomy and astrophysics; instrumentation, techniques, and astronomical observations
	96.	Solar system; planetology
	96.10.+i	General; solar nebula; cosmogony
	96.12.-a	Planetology of solid surface planets (see also 96.15.−g Planetology of fluid planets; 96.30.Bc Comparative planetology)
	96.12.Bc	Origin and evolution
	96.12.De	Orbital and rotational dynamics
	96.12.Fe	Gravitational fields
	96.12.Hg	Magnetic field and magnetism
	96.12.Jt	Atmospheres
	96.12.Kz	Surfaces
	96.12.Ma	Composition
	96.12.Pc	Interiors
	96.12.Qr	Polar regions
	96.12.St	Heat flow
	96.12.Uv	Rings and dust
	96.12.Wx	Interactions with particles and fields
	96.12.Xy	Tectonics, volcanism
	96.15.-g	Planetology of fluid planets (see also 96.12.−a Planetology of solid surface planets; 96.30.Bc Comparative planetology)
	96.15.Bc	Origin and evolution
	96.15.De	Orbital and rotational dynamics
	96.15.Ef	Gravitational fields
	96.15.Gh	Magnetic field and magnetism
	96.15.Hy	Atmospheres
	96.15.Kc	Composition
	96.15.Lb	Surfaces
	96.15.Nd	Interiors
	96.15.Pf	Physical properties of materials
	96.15.Qr	Impact phenomena
	96.15.St	Tori and exospheres
	96.15.Uv	Rings and dust
	96.15.Vx	Interactions with particles and fields
	96.15.Wx	Tidal forces
	96.15.Xy	Polar regions
	96.20.-n	Moon
	96.20.Br	Origin and evolution
	96.20.Dt	Features, landmarks, mineralogy, and petrology
	96.20.Jz	Gravitational field, selenodesy, and magnetic fields
	96.20.Ka	Impacts, cratering
	96.25.-f	Planetology of comets and small bodies
	96.25.Bd	Origin and evolution
	96.25.De	Orbital and rotational dynamics
	96.25.Fx	Atmospheres
	96.25.Hs	Composition
	96.25.Jz	Ionospheres
	96.25.Ln	Magnetic fields and magnetism
	96.25.Nc	Gravitational fields
	96.25.Pq	Impact phenomena
	96.25.Qr	Interactions with solar wind plasma and fields
	96.25.St	Plasma and MHD instabilities
	96.25.Tg	Radiation and spectra
	96.25.Vt	Satellites
	96.25.Xz	Volcanism
	96.30.-t	Solar system objects
	96.30.Bc	Comparative planetology (see also 96.12.−a Planetology of solid surface planets; 96.15.−g Planetology of fluid planets)
	96.30.Cw	Comets (see also 96.25.−f Planetology of comets and small bodies)
	96.30.Dz	Mercury
	96.30.Ea	Venus
	96.30.Gc	Mars
	96.30.Hf	Martian satellites
N	96.30.Iz	Dwarf Planets
N	96.30.Ja	Dwarf planet satellites
	96.30.Kf	Jupiter
	96.30.L-	Jovian satellites
	96.30.lb	Io
	96.30.ld	Europa
	96.30.lf	Ganymede
	96.30.lh	Callisto
	96.30.Mh	Saturn
	96.30.N-	Saturnian satellites
	96.30.nd	Titan
	96.30.Pj	Uranus
	96.30.Qk	Uranian satellites
	96.30.Rm	Neptune
	96.30.Sn	Pluto
	96.30.Td	Neptunian satellites
	96.30.Up	Plutonian satellites
	96.30.Vb	Dust, extraterrestrial materials
	96.30.Wr	Planetary rings
	96.30.Xa	Kuiper belt, trans-Neptunian objects
	96.30.Ys	Asteroids, meteoroids
	96.30.Za	Meteors, meteorites and tektites (see also 91.65.Sn Meteorite mineralogy and petrology; 94.20.Xa Meteor-trail physics; 91.67.gn—in Geophysics Appendix)
	... ... ...	Planetary, asteroid, cometary, and satellite characteristics and properties, see 96.12.−a, 96.15.−g, and 96.25.−f
	... ... ...	Cosmic rays, see 96.50.S−
	96.50.-e	Interplanetary physics (see also 94.05.−a Space plasma physics)
	96.50.Bh	Interplanetary magnetic fields
	96.50.Ci	Solar wind plasma; sources of solar wind
	96.50.Dj	Interplanetary dust and gas
	96.50.Ek	Heliopause and solar wind termination
	96.50.Fm	Planetary bow shocks; interplanetary shocks
	... ... ...	Comets, see 96.30.Cw; 96.30C− (in Geophysics Appendix)
	96.50.Hp	Oort cloud
	... ... ...	Kuiper belt, see 96.30.Xa
	... ... ...	Meteors, meteoroids, and meteor streams, see 96.30.Za
	... ... ...	Meteorites, micrometeorites, and tektites, see 96.30.Za
	96.50.Pw	Particle acceleration
	96.50.Qx	Corotating streams
	96.50.Ry	Discontinuities
	96.50.S-	Cosmic rays (see also 94.20.wq Solar radiation and cosmic ray effects)
	96.50.sb	Composition, energy spectra and interactions
	96.50.sd	Extensive air showers
	96.50.sf	Interactions with terrestrial matter
	96.50.sh	Interplanetary propagation and effects
	96.50.Tf	MHD waves; plasma waves, turbulence
	96.50.Uv	Ejecta, driver gases, and magnetic clouds
	96.50.Vg	Energetic particles
	96.50.Wx	Solar cycle variations
	96.50.Xy	Heliosphere/interstellar medium interactions
	96.50.Ya	Pickup ions
	96.50.Zc	Neutral particles
	96.55.+z	Astrobiology and astrochemistry of the Solar system and interplanetary space (see also 91.62.Fc—in Geophysics Appendix)
	96.60.-j	Solar physics
	96.60.Bn	Diameter, rotation, and mass
	96.60.Fs	Composition
	96.60.Hv	Electric and magnetic fields, solar magnetism
	96.60.Iv	Magnetic reconnection
	96.60.Jw	Solar interior
	96.60.Ly	Helioseismology, pulsations, and shock waves
	96.60.Mz	Photosphere
	96.60.Na	Chromosphere
	96.60.P-	Corona
	96.60.pc	Coronal holes
	96.60.pf	Coronal loops, streamers
	96.60.ph	Coronal mass ejection
	96.60.Q-	Solar activity (see also 92.70.Qr—in Global change)
	96.60.qd	Sun spots, solar cycles
	96.60.qe	Flares
	96.60.qf	Prominence eruptions
	96.60.Tf	Solar electromagnetic emission
	96.60.Ub	Solar irradiance
S	96.60.Vg	Particle emission, solar wind
M	96.60.Vg	Particle emission, solar wind (see also 94.30.vf—in Geophysics Appendix; 26.65.+t Solar neutrinos in nuclear astrophysics)
	96.60.Xy	Transition region
	96.90.+c	Other topics on the Solar system and planetology (restricted to new topics in section 96)
S	97.	Stars
M	97.	Stars (for relativistic stars, see 04.40.Dg in general relativity and gravitation)
S	97.10.-q	Stellar characteristics and properties
M	97.10.-q	Stellar characteristics and properties (see also section 26 Nuclear astrophysics)
	97.10.Bt	Star formation
	97.10.Cv	Stellar structure, interiors, evolution, nucleosynthesis, ages
	97.10.Ex	Stellar atmospheres (photospheres, chromospheres, coronae, magnetospheres); radiative transfer; opacity and line formation
	97.10.Fy	Circumstellar shells, clouds, and expanding envelopes; circumstellar masers (for interstellar masers, see 98.38.Er or 98.58.Ec)
	97.10.Gz	Accretion and accretion disks
	97.10.Jb	Stellar activity
	97.10.Kc	Stellar rotation
	97.10.Ld	Magnetic and electric fields; polarization of starlight
	97.10.Me	Mass loss and stellar winds
	97.10.Nf	Masses
	97.10.Pg	Radii
	97.10.Qh	Surface features (including starspots)
	97.10.Ri	Luminosities; magnitudes; effective temperatures, colors, and spectral classification
	97.10.Sj	Pulsations, oscillations, and stellar seismology
	97.10.Tk	Abundances, chemical composition
	97.10.Vm	Distances, parallaxes
	97.10.Wn	Proper motions and radial velocities (line-of-sight velocities); space motions (see also 95.10.Jk Astrometry and reference systems)
	97.10.Xq	Luminosity and mass functions
	97.10.Yp	Star counts, distribution, and statistics
	97.10.Zr	Hertzsprung-Russell, color-magnitude, and color-color diagrams
	97.20.-w	Normal stars (by class): general or individual
	97.20.Ec	Main-sequence: early-type stars (O and B)
	97.20.Ge	Main-sequence: intermediate-type stars (A and F)
	97.20.Jg	Main-sequence: late-type stars (G, K, and M)
	97.20.Li	Giant and subgiant stars
	97.20.Pm	Supergiant stars
	97.20.Rp	Faint blue stars (including blue stragglers), white dwarfs, degenerate stars, nuclei of planetary nebulae (for planetary nebulae, see 98.38.Ly or 98.58.Li)
	97.20.Tr	Population II stars (horizontal branch, metal poor, etc.)
	97.20.Vs	Low luminosity stars, subdwarfs, and brown dwarfs
	97.20.Wt	Population III stars
	97.21.+a	Pre-main sequence objects, young stellar objects (YSO's) and protostars (T Tauri stars, Orion population, Herbig–Haro objects, Bok globules, bipolar outflows, cometary nebulae, etc.) (see also 98.38.Fs and 98.58.Fd Jets, outflows and bipolar flows—in the Milky Way and external galaxies respectively)
	97.30.-b	Variable and peculiar stars (including novae)
	97.30.Dg	Low-amplitude blue variables (alpha Cygni, beta Cephei, delta Scuti, delta Delphini, delta Canis Majoris, SX Phoenicius, etc.)
	97.30.Eh	Emission-line stars (Of, Be, Luminous Blue Variables, Wolf–Rayet, etc.)
	97.30.Fi	Chemically peculiar stars (Ap, Am, etc.)
	97.30.Gj	Cepheids (delta Cephei, W Virginis)
	97.30.Hk	Carbon stars, S stars, and related types (C, S, R, and N)
	97.30.Jm	Long-period variables (Miras) and semiregulars
	97.30.Kn	RR Lyrae stars; RV Tauri and PV Telescopii variables
	97.30.Nr	Flare stars (UV Ceti, RS Canum Venaticorum, FU Orionis, R Coronae Borealis variables, etc.)
	97.30.Qt	Novae, dwarf novae, recurrent novae, and other cataclysmic (eruptive) variables (see also 97.80.Gm, Jp Cataclysmic binaries and X-ray binaries)
	97.30.Sw	Unusual and peculiar variables
S	97.60.-s	Late stages of stellar evolution (including black holes)
M	97.60.-s	Late stages of stellar evolution (including black holes)
S	97.60.Bw	Supernovae
M	97.60.Bw	Supernovae (see also 26.30.−k Nucleosynthesis in novae, supernovae, and other explosive stars; for nuclear physics aspects of supernovae evolution, see 26.50.+x)
	97.60.Gb	Pulsars
S	97.60.Jd	Neutron stars
M	97.60.Jd	Neutron stars (see also 26.60.−c Nuclear matter aspects of neutron stars in—Nuclear physics)
	97.60.Lf	Black holes (see also 04.70.−s Physics of black holes in—General relativity and gravitation; for galactic black holes, see 98.35.Jk and 98.62.Js)
	97.80.-d	Binary and multiple stars
	97.80.Af	Astrometric and interferometric binaries
	97.80.Di	Visual binaries
	97.80.Fk	Spectroscopic binaries; close binaries
	97.80.Gm	Cataclysmic binaries (novae, dwarf novae, recurrent novae, and nova-like objects); symbiotic stars (see also 97.30.Qt Novae)
	97.80.Hn	Eclipsing binaries
	97.80.Jp	X-ray binaries (see also 98.70.Qy X-ray sources and 97.60.Gb Pulsars)
	97.80.Kq	Multiple stars
	97.82.-j	Extrasolar planetary systems
	97.82.Cp	Photometric and spectroscopic detection; coronographic detection; interferometric detection
	97.82.Fs	Substellar companions; planets
	97.82.Jw	Infrared excess; debris disks; protoplanetary disks; exo-zodiacal dust
	97.90.+j	Other topics on stars (restricted to new topics in section 97)
	98.	Stellar systems; interstellar medium; galactic and extragalactic objects and systems; the Universe
	98.10.+z	Stellar dynamics and kinematics
	98.20.-d	Stellar clusters and associations
	98.20.Af	Associations of stars (OB, T, R) in the Milky Way
	98.20.Bg	Associations of stars (OB, T, R) in external galaxies
	98.20.Di	Open clusters in the Milky Way
	98.20.Fk	Open clusters in external galaxies
	98.20.Gm	Globular clusters in the Milky Way
	98.20.Jp	Globular clusters in external galaxies
	98.35.-a	Characteristics and properties of the Milky Way galaxy
	98.35.Ac	Origin, formation, evolution, age, and star formation
	98.35.Bd	Chemical composition and chemical evolution
	98.35.Ce	Mass and mass distribution
	98.35.Df	Kinematics, dynamics, and rotation
	98.35.Eg	Electric and magnetic fields
	98.35.Gi	Galactic halo
	98.35.Hj	Spiral arms and galactic disk
	98.35.Jk	Galactic center, bar, circumnuclear matter, and bulge (including black hole and distance measurements)
	98.35.Ln	Stellar content and populations; morphology and overall structure
	98.35.Mp	Infall and accretion
	98.35.Nq	Galactic winds and fountains
	98.35.Pr	Solar neighborhood
	98.38.-j	Interstellar medium (ISM) and nebulae in Milky Way
	98.38.Am	Physical properties (abundances, electron density, magnetic fields, scintillation, scattering, kinematics, dynamics, turbulence, etc.)
	98.38.Bn	Atomic, molecular, chemical, and grain processes
	98.38.Cp	Interstellar dust grains; diffuse emission; infrared cirrus
	98.38.Dq	Molecular clouds, H2 clouds, dense clouds, and dark clouds
	98.38.Er	Interstellar masers (for circumstellar masers, see 97.10.Fy)
	98.38.Fs	Jets, outflows, and bipolar flows (for pre-main sequence objects, see 97.21.+a)
	98.38.Gt	H I regions and 21-cm lines; diffuse, translucent, and high-velocity clouds
	98.38.Hv	H II regions; emission and reflection nebulae
	98.38.Jw	Infrared emission
	98.38.Kx	Intercloud medium (ICM); hot and highly ionized gas; bubbles
	98.38.Ly	Planetary nebulae (for nuclei of planetary nebulae, see also 97.20.Rp)
	98.38.Mz	Supernova remnants
	98.52.-b	Normal galaxies; extragalactic objects and systems (by type)
	98.52.Cf	Classification and classification systems
	98.52.Eh	Elliptical galaxies
	98.52.Lp	Lenticular (S0) galaxies
	98.52.Nr	Spiral galaxies
	98.52.Sw	Irregular and morphologically peculiar galaxies
	98.52.Wz	Dwarf galaxies (elliptical, irregular, and spheroidal)
	98.54.-h	Quasars; active or peculiar galaxies, objects, and systems
	98.54.Aj	Quasars (for quasar absorption and emission-line systems; Lyman forest, see 98.62.Ra)
	98.54.Cm	Active and peculiar galaxies and related systems (including BL Lacertae objects, blazars, Seyfert galaxies, Markarian galaxies, and active galactic nuclei)
	98.54.Ep	Starburst galaxies and infrared excess galaxies
	98.54.Gr	Radio galaxies
	98.54.Kt	Protogalaxies; primordial galaxies
	98.56.-p	Local group; Magellanic Clouds
	98.56.Ew	Elliptical galaxies
	98.56.Ne	Spiral galaxies (M31 and M33)
	98.56.Si	Magellanic Clouds and other irregular galaxies
	98.56.Tj	Magellanic stream
	98.56.Wm	Dwarf galaxies (elliptical, irregular, and spheroidal)
	98.58.-w	Interstellar medium (ISM) and nebulae in external galaxies
	98.58.Ay	Physical properties (abundances, electron density, magnetic fields, scintillation, scattering, kinematics, dynamics, turbulence, etc.)
	98.58.Bz	Atomic, molecular, chemical, and grain processes
	98.58.Ca	Interstellar dust grains; diffuse emission; infrared cirrus
	98.58.Db	Molecular clouds, H2 clouds, dense clouds, and dark clouds
	98.58.Ec	Interstellar masers (for circumstellar masers, see 97.10.Fy)
	98.58.Fd	Jets, outflows and bipolar flows (for pre-main sequence objects, see 97.21.+a)
	98.58.Ge	H I regions and 21-cm lines; diffuse, translucent, and high-velocity clouds
	98.58.Hf	H II regions; emission and reflection nebulae
	98.58.Jg	Infrared emission
	98.58.Kh	Intercloud medium (ICM); hot and highly ionized gas; bubbles
	98.58.Li	Planetary nebulae (for nuclei of planetary nebulae, see also 97.20.Rp)
	98.58.Mj	Supernova remnants
	98.58.Nk	Tidal tails; H I shells
	98.62.-g	Characteristics and properties of external galaxies and extragalactic objects (for the Milky Way, see 98.35.−a)
	98.62.Ai	Origin, formation, evolution, age, and star formation
	98.62.Bj	Chemical composition and chemical evolution
	98.62.Ck	Masses and mass distribution
	98.62.Dm	Kinematics, dynamics, and rotation
	98.62.En	Electric and magnetic fields
	98.62.Gq	Galactic halos
	98.62.Hr	Spiral arms and bars; galactic disks
	98.62.Js	Galactic nuclei (including black holes), circumnuclear matter, and bulges
	98.62.Lv	Stellar content and populations; radii; morphology and overall structure
	98.62.Mw	Infall, accretion, and accretion disks
	98.62.Nx	Jets and bursts; galactic winds and fountains
	98.62.Py	Distances, redshifts, radial velocities; spatial distribution of galaxies (for observational cosmology, see 98.80.Es)
	98.62.Qz	Magnitudes and colors; luminosities
	98.62.Ra	Intergalactic matter; quasar absorption and emission-line systems; Lyman forest (for quasars, see 98.54.Aj; for intracluster matter, see 98.65.Hb)
	98.62.Sb	Gravitational lenses and luminous arcs (see also 95.30.Sf Relativity and gravitation—in fundamental aspects of astrophysics and section 04 General relativity and gravitation)
	98.62.Tc	Astrometry; identification
	98.62.Ve	Statistical and correlative studies of properties (luminosity and mass functions; mass-to-light ratio; Tully-Fisher relation, etc.)
	98.65.-r	Galaxy groups, clusters, and superclusters; large scale structure of the Universe
	98.65.At	Interacting galaxies; galaxy pairs, and triples
	98.65.Bv	Small and compact galaxy groups
	98.65.Cw	Galaxy clusters
	98.65.Dx	Superclusters; large-scale structure of the Universe (including voids, pancakes, great wall, etc.)
	98.65.Fz	Galaxy mergers, collisions, and tidal interactions
	98.65.Hb	Intracluster matter; cooling flows
	98.70.-f	Unidentified sources of radiation outside the Solar System
	98.70.Dk	Radio sources
	... ... ...	Quasars, see 98.54.Aj
	98.70.Lt	IR sources (for IR sources in interstellar medium, see 98.38.Jw and/or 98.58.Jg)
	98.70.Qy	X-ray sources; X-ray bursts (see also 97.30.Qt Novae, dwarf novae, recurrent novae, and other cataclysmic (eruptive) variables; 97.80.Jp X-ray binaries)
	98.70.Rz	γ-ray sources; γ-ray bursts
	98.70.Sa	Cosmic rays (including sources, origin, acceleration, and interactions) (see also 26.40.+r Cosmic ray nucleosynthesis—in Nuclear astrophysics)
	98.70.Vc	Background radiations
	98.80.-k	Cosmology (see also section 04 General relativity and gravitation; for origin and evolution of galaxies, see 98.62.Ai; for elementary particle and nuclear processes, see 95.30.Cq; for dark matter, see 95.35.+d; for dark energy, see 95.36.+x; for superclusters and large-scale structure of the Universe, see 98.65.Dx)
	98.80.Bp	Origin and formation of the Universe
	98.80.Cq	Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)
	98.80.Es	Observational cosmology (including Hubble constant, distance scale, cosmological constant, early Universe, etc)
	98.80.Ft	Origin, formation, and abundances of the elements (see also 26.35.+c Big Bang nucleosynthesis—in Nuclear astrophysics)
	98.80.Jk	Mathematical and relativistic aspects of cosmology
	98.80.Qc	Quantum cosmology (see also 04.60.−m Quantum gravity—in General relativity and gravitation)
	98.90.+s	Other topics on stellar systems; interstellar medium; galactic and extragalactic objects and systems; the Universe (restricted to new topics in section 98)
	99.10.-x	Errata and other corrections
	99.10.Cd	Errata
	99.10.Fg	Publisher's note
	99.10.Jk	Corrected article
	99.10.Ln	Retraction
	99.10.Np	Editorial note
N	99.10.Qr	Addenda