AST 307 · Introductory Astronomy
Chapter 19 Oct. 22
What forces tend to pull a molecular cloud together, and what forces tend to resist its contraction?
Describe the concept of equilibrium.
What does it mean to say that a protostar is in hydrostatic (or pressure-gravity) equilibrium, but not in thermal equilibrium? What happens as a result?
How can we observe protostars, and how do they differ in appearance from main-sequence stars?
29 October 2003
Astronomy Program ·
The University of Texas at Austin
· Austin, Texas 78712
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