The stars are suns
Demo on determining Luminosity and Size of stars...
From Blackbody model, can determine Temperature of stars
(graph and table). E.g., for Orion's stars
Plot this Temperature and Luminosity together in an H-R Diagram
(c.f., Chaisson Figs 17.13-15 on pp.464-5. Similar to a Color vs. Magnitude diagram
Diagonal of H-R diagram represents main-sequence stars.
(c.f., typical properties of main sequence stars, Chaisson Table 17.6 )
Know H-R diagram, including main sequence, white dwarfs and red giants
Star distances in our solar neighborhood (e.g., Proxima Centauri 4.3 LY)
In our previous Earth = marble model, nearest star would be about 27,000 km. So Earth itself couldn't fit the model.
Making Sun = marble (1/100 scale) then Earth = grain of sand orbiting 1 meter away. Nearest star, Proxima Centauri, would be about 270 km away.
Chaisson: Chapters 17, 18
Document URL: http://www.uh.edu/~jclarage/astr3131/lectures/9/9.html
