10:27:09 Stars - 27/10/200907:36:00 Stars...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
27/10/2009 07:36:00 Stars Massive balls of gas floating in space o Composed primarily H and He Produce their own energy o Mostly through H+H+H+H -> He Our Galaxy: roughly 10 11  (100 billion) stars The Sun: a typical star o Stars range from about .1 to about 100 Solar Masses o Individual stars evolve as they ago… sun is in middle of its ~10 10  year  life span Why Sustained Fusion Only in Stars The problem is positive charges in Hydrogen nucleus repel each other  because of electromagnetism Requires high densities and temperatures to push proton close enough  together, so that the attractive strong nucleus force takes over. o Happens in the center of stars (definition of star) although very difficult  to achieve in a lab This “fusion” of lighter elements to heavier ones is what powers stars. Works  
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/17/2011 for the course ISP 205 taught by Professor Donahue during the Fall '08 term at Michigan State University.

Page1 / 4

10:27:09 Stars - 27/10/200907:36:00 Stars...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online