AST 104 Lecture Notes - Lecture 17: Binary Star, Star Formation, Solar Mass
Document Summary
Lecture 17: structure of the milky way part 2. Here"s a schematic with the major parts of the milky way galaxy. Disk - mostly population i stars, plus gas and dust. Bulge - older population i stars, little gas and dust. Halo - population ii stars (incl. globular clusters) Infrared, radio, and even x-ray images reveal more past the disk"s dust: There are giant clouds of dusty gas between the stars, obscuring much of our view along the plane of the milky way. These clouds are opaque to visible light but transparent to longer wavelengths (infrared). Radio image of the most central region of the milky way galaxy. Sag a* is the physical center and contains a supermassive black hole. False-color x-ray image of the central regions of the milky way. Point sources are neutron stars and white dwarfs. Bright green regions are recent supernova remnants. Central bright green region is sag a*
