What is a brown dwarf? Why is don't brown dwarfs evolve into Main Sequence stars?
What observations support the idea of fragmentation?
What observations have been made of stars on the Hayashi track?
What is a cocoon nebula? Why might this explain why it is difficult to see some stages of forming stars?
What is a shock wave? How will a shock wave affect an interstellar cloud?
How might star formation trigger other star formation?
Why would you expect to find new stars forming near HII regions?
Why are stars often observed in clusters or associations?