HW#26: pg. 488 Rev 4 – 6, CST 4 – 6
Rev 4 – 6
4. Why does the evolution of a protostar slow down as the star approaches the main sequence?
5. In what ways do the formative stages of high-mass stars differ from those of mass like the Sun?
6. What are brown dwarfs?
CST 4 – 6
4. A protostar that will eventually turn into a star like the Sun is significantly (a) smaller; (b) more luminous; (c) fainter; (d) less massive than the Sun.
5. Prestellar objects in which nuclear fusion never starts are referred to as (a) terrestrial planets; (b) brown dwarfs; (c) protostars; (d) globules.
6. The current theory of star formation is based upon (a) amassing evidence from many different regions of our Galaxy; (b) carefully studying the births of a few stars; (c) systematically measuring the masses and rotation rates of interstellar clouds; (d) observations made primarily at short wavelengths.