alpha particle

mass transfer

Cepheid variable

metal-poor star

close binary

metal-rich star

color-magnitude diagram

open cluster

contact binary

overcontact binary

core helium fusion

Pauli exclusion principle

core hydrogen fusion

period-luminosity relation

degeneracy

Population I star

degenerate-electron pressure

Population II star

detached binary

pulsating variable star

globular cluster

red dwarf

helium flash

red giant

helium fusion

Roche lobe

horizontal-branch star

RR Lyrae variable

ideal gas

semidetached binary

inner Lagrangian point

shell hydrogen fusion

instability strip

triple alpha process

long-period variable

turnoff point

main-sequence lifetime

zero-age main sequence (ZAMS)

mass loss

zero-age main-sequence star