Slide 1Spring 2012 Astronomy Course Mississippi Valley Night Sky Conservation The Sky Around Us Program developed by Mississippi Valley Conservation Authority Royal Astronomical…

Slide 1Astronomy Problems 561: 02-15-11 HR Diagram part II Slide 2 Slide 3 HR Diagram for nearest 16,000 stars: Most stars lie along the Main Sequence – Simple relationship…

Slide 1Stellar Evolution II Slide 2 The Upper End of the Main Sequence: How massive can a star get? Larger clouds of gas (GMCs) tend to fragment into smaller ones before…

Slide 1Life Cycle of a Star Slide 2 Stage 1 Protostars Slide 3 Slide 4 Protostars Huge clouds of gas (hydrogen) in which stars are made. Many thousands of times bigger than…

Slide 1Stellar Physics 10 lectures, exploring the development of cosmology, and some of the key ideas of Big Bang theory Access PPT slides at http://www.astro.gla.ac.uk/users/martin/teaching/aberdeen.ppt…

Slide 1Stars Dr Katy Lancaster Slide 2 Overview Introduction to stars –What they are –What we can measure The Hertzsprung-Russell Diagram Star life cycles –Evolution…

Slide 1Galaxy feedback in 3D Roberto Maiolino Slide 2 Feedback is the key: - reducing SF efficiency (gas heating+turbulence) - removing baryons Discrepancy between halo mass…

Slide 1Life Cycle of a Star Waves, Atoms and Space Slide 2 Stage 1 Protostars Slide 3 Slide 4 Protostars Huge clouds of gas (hydrogen) in which stars are made. Many thousands…

Slide 1Stellar Evolution up to the Main Sequence Slide 2 Stellar Evolution Recall that at the start we made a point that all we can "see" of the stars is: Brightness…

Slide 11st Step: –Stars form from nebulas Regions of concentrated dust and gas –Gas and dust begin to collide, contract and heat up All due to gravity Slide 2 2nd Step:…