The following list of term paper topics is meant to be suggestive and not inclusive. In fact some of the headings are too broad and you should narrow your paper down to some detailed aspect of the broad topic. Check with me, if you think your topic will not fit within one of these categories. Do not write on white dwarfs, neutron stars or black holes.
Star Formation
Dust Clouds
Molecular Clouds
IR Stars
T Tauri Stars
Main Sequence (For some of these you will have to concentrate on
the Sun)
Stellar Spectra
Stellar Coronae
Stellar Chromospheres
Stellar Photospheres
Stellar Atmospheres
The Sun
Sunspots
Solar Activity Cycle
Solar Neutrino Problem
Solar Transients (e.g. Flares)
Solar Oscillations
Red Giants
Supergiants
Cepheid Variables
W Virginis Variables
RR Lyrae Variables
Formation of Planetary Nebulae
Stellar Evolution
Detailed Evolution of an X Type Star
Evolution of Close Binaries
Supernovae