uw-python/2014_Astr599_HW — pull request #73 by tomyun (2014-10-24 04:53:19+00:00)
Title: Homework 4

[Here](http://nbviewer.ipython.org/github/tomyun/2014_Astr599_HW/blob/HW4_branch/tomyun/HW4.ipynb) is a link to nbviewer.