Astrophysical phenomenon, process or feature

Extinction or absorption
phys.absorption
Acceleration
phys.acceleration
Atomic/molecular excitation
phys.atmol.excitation
Ionization, jump from bound to unbound energy state
phys.atmol.ionization
Transition between states
phys.atmol.transition
Molecular dissociation
phys.mol.dissociation
Polarization
phys.polarization
Astrophysical phenomenon, process or feature
process
Generic absorption of wave or particle
process.absorption
Acceleration (particles, etc.)
process.acceleration
Mass accretion
process.accretion
Gravitational collapse
process.collapse
Conduction
process.conduction
Convection
process.convection
Diffusion
process.diffusion
Circum-object disk with thickness H < R and R_in < R_out
process.disk
Eclipse of two physically related objects
process.eclipse
Generic emission of wave or particle
process.emission
Sudden brightening, outburst
process.eruption
Explosion
process.explosion
Excitation, jump in a higher energy (bound) state
process.excitation
Gravitational lensing
process.gravitation.lensing
Non-resolved gravitational lensing
process.gravitation.micro-lensing
Gravitational wave
process.gravitation.wave
Generic instability
process.instability
Generic interaction between two or more distinct objects
process.interaction
Maser (as a process)
process.maser
Mass loss
process.mass-loss
Ejection, loss of a distinct body of mass
process.mass-loss.ejection
Mass-loss through a collimated jet
process.mass-loss.jet
mass-loss through a poorly collimated wind
Process.mass-loss.wind
Merging of two or more distinct objects
process.merging
Nuclear reactions, nucleosynthesis
process.nucleosynthesis
Occultation of two physically unrelated objects
process.occultation
Pulsation
process.pulsation
Non-radial pulsation
process.pulsation.non-radial
Radial pulsation
process.pulsation.radial
Radiation mechanisms: non-thermal
process.radiation.non-thermal
Radiation mechanisms:thermal
process.radiation.thermal
Redshift
process.redshift
Circum-object ring with thickness H < R and R_in ~ R_out
process.ring
Recombination, from unbound to bound energy state
process.recombination
Rotation
process.rotation
Scattering
process.scattering
Shock front/wave(HD, MHD, Ionization, etc.)
process.shock
Distinct physical region on an object with different properties
process.spot
Starburst
process.starburst
Change in some property with time
process.variation
Generic sudden change with time
process.variation.burst
Cyclic, periodic change
process.variation.cyclic
Rapid change with time followed by a return to normalcy
process.variation.flare
Sudden change of frequency
process.variation.glitch
Very luminous state of variable object, high state
process.variation.high-state
Quiescent or low luminsous state of variable object
process.variation.low-state
Semi-regular or quasi-periodic variation
process.variation.quasi-periodic
Temporary, non-periodic change
process.variation.transient