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Phys 231, Topic 4: Stellar Evolution 1
Physics 231: Section 4Stellar Evolution
http://mimas.physics.drexel.edu/phys231
Phys 231, Topic 4: Stellar Evolution 2
The Milky Way at 21 cm
Map of neutral hydrogen (e.g. H I Clouds).
Phys 231, Topic 4: Stellar Evolution 3
Molecular CloudsThe Horsehead (IC434) Nebula, part of the Orion complex. Note that these are most easily seen as absorption.