Slide 1 Chapter 27: Stars and Galaxies H. Thiele Earth Science Slide 2 Characteristics of Stars Size varies from 20km to 1billion km Color varies based on temperature Mass…

Slide 1 Stellar Evolution Slide 2 Basic Structure of Stars Mass and composition of stars determine nearly all of the other properties of stars Mass and composition of stars…

Slide 1 Slide 2 Calculating the distance to a Cepheid variable star Measure the period – 5 days Use the period to work out the luminosity Measure the observed brightness…

Stellar Evolution â Life of a Star Stellar evolution is the process in which the forces of pressure (gravity) alter the star. Stellar evolution is inevitable; stars deplete…

Stellar Evolution â Life of a Star Stellar evolution is the process in which the forces of pressure (gravity) alter the star. Stellar evolution is inevitable; stars deplete…