Astr 221 November 5, 2003: Gas Clouds  

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Hydrogen in Molecular form

Question: Where did the photon come from?

using CO

Question: What physical processes cause ionized hydrogen to glow?

question: What will encourage stars to collapse, and what will prevent it?

Question: Why might dust be useful?

Star formation

Simple Criterion for gravitational collapse

Using shells

two point masses and total potential energy

with kinetic energy

gravitationally bound clouds

Jeans' mass

Magnetic Field

Electric currents