General Astronomy -
Spring 2013
Homework #5 - due February 19
1. (1 pt) How the pressure differ between a normal and a
degenerate gas?
2. (3 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. (2 pt) How long does a one solar mass star spend in each of
the following stages: protostar, main sequence, red giant,
horizontal branch.
4. (2 pt) A cluster of stars contains B stars, but no O stars
on the main sequence. How old is the cluster?
5. (1 pt) What elements can be produced in one solar mass
stars?
6. (1 pt) What elements are produced in supernovae of massive
stars?