The article, designing a house for the sun, was explaining how to design a house to receive the maximum amount of natural light and heat. It explains many things from the direction your house should be facing to where to place windows in the house.
I learned that when it is time to place the house that you should have it diagonally to the south. This is because every room gets direct sunbeams during one period of the day. Also this means that rooms on the south corner get sun from sunrise to sun set. This keeps the house the warmest.