Lecture 21 Stellar Evolution. Announcements Homework 11 due now Homework 11 due now Homework 12 – Due Monday April 30 Homework 12 – Due Monday April 30.
The Lives of Stars Chapter 12. Life on Main-Sequence Zero-Age Main Sequence (ZAMS) –main sequence location where stars are born Bottom/left edge of main.
Stellar Evolution. The stellar evolution involves two opposite forces: on one side, the star’s mass produces the force of gravity, which leads to a contraction,
Astronomy 535 Stellar Structure Evolution. Course Philosophy “Crush them, crush them all!” -Professor John Feldmeier.
Stellar Evolution. The Life of a Star Mass Is the Key Stars require millions to billions of years to evolve – a time that is incredibly slow by human.
Astro-2: History of the Universe Lecture 7; May 2 2013.
Stars Part Two: Stellar Evolution. Overview of the life of a star: 1.Formation of protostar from a cloud of mostly Hydrogen gas. 2.Main sequence star.
Grains and Gas in Classical Nova Ejecta Presolar Grains Workshop, St. Louis, MO, January 28, 2012 R. D. Gehrz1 Grains and Gas in the Ejecta of Classical.
Stellar Winds and Mass Loss Brian Baptista. Summary Observations of mass loss Mass loss parameters for different types of stars Winds colliding with the.
Stars Star field taken with Hubble Space Telescope.
Chapter 20 Stellar Evolution. 20.1Leaving the Main Sequence 20.2Evolution of a Sun-Like Star The CNO Cycle 20.3The Death of a Low-Mass Star Learning Astronomy.
Chapter 12 Stellar Evolution. Units of Chapter 12 Leaving the Main Sequence Evolution of a Sun-like Star The Death of a Low-Mass Star Evolution of Stars.