General Astronomy - Spring
2011
Homework #5 - due February 21
1. (3 pt) How the pressure differ between a normal and a
degenerate gas?
2. (6 pt) Draw, by hand, a curve on an HR diagram showing the
evolution
of a solar
mass star through the phases protostar, main sequence, red giant,
horizontal branch, asymptotic giant branch, planetary nebula, and white
dwarf. Be sure to label and enumerate the axes of the HR diagram.
3. (4 pt) How long does a one solar mass star spend in each of
the
following stages: protostar, main sequence, red giant, horizontal
branch.
4. (4 pt) A cluster of stars contains B stars, but no O stars on
the
main sequence. How old is the cluster?
5. (3 pt) What elements can be produced in one solar mass
stars?
What elements are produced in supernovae of massive stars?