A. Class Business
B. Stellar Birth
Q: HOW DO STARS BEGIN THEIR LIVES?
C. Stellar Lifecycles
Q: HOW DO DIFFERENT STARS EVOLVE?
|
MASS (in solar masses) sub-solar (< 1) solar (1 - 5) massive (5 - 25) supermassive (> 25) |
spec. class M/K G/F/A B O |
time on MS 200/10 byr. 10/3/.5 byr 10 myr 1 myr |
D. Stellar Death
Q: WHAT DOES IT MEAN FOR A STAR TO DIE?
Q: HOW DOES A STAR MEET SUCH AN END?
Q: WHAT PREVENTS A WHITE DWARF FROM COLLAPSING FURTHER THAN IT DOES?
A: DEGENERATE ELECTRONS, of course! Basically, electrons in atoms don't like to be packed too tightly, so they push back -- to a point.
E. Star Clusters
|
object globular cluster open cluster O-B assoc. |
# of objects 200 in MW 1000's in MW 1000's in MW |
stars' #/type 104-6/red ~100's/red & blue 5-50/ blue |
where in MW halo & center disk spiral arms |
age/stars' color very old/red still forming/red & blue still forming/blue |
examples APOD list* APOD list* ROSAT image* |
F. Miscellaneous
A: _________________________________________