Key Words

molecular clouds
molecular hydrogen
hydrostatic equilibrium
hydrodynamics
Jeans mass
Jeans density
fragmentation of cloud
spiral density waves
shock waves
protostars
cocoon
EGGs
accretion disks
bipolar flow
T-Tauri stars
Herbig-Haro objects
ejected jets
evolutionary track
Hyashi track
radiative core
Kelvin-Helmholtz timescale
virial theorem
main sequence lifetimes
ZAMS
dynamical timescales
free-fall timescale
expansion timescale
limiting lower mass
brown dwarfs
upper mass limit
Eddington luminosity
Wolf-Rayet stars