Astro 1050     Wed. Nov. 12, 2003

Possible Origin of Spiral Arms

Degree of Organization
 of the Spiral Arms

Degree of Organization
 of the Spiral Arms

Tracing the Spiral Arms

M51:  The Whirlpool Galaxy

Density Wave Theory

M51:  The Whirlpool Galaxy

Self Sustaining Star Formation

Two limiting cases of spirals

The Nucleus of the Galaxy

A movie of stars at the core

A movie of stars at the core