astLib.astSED.SED:
This class describes a Spectral Energy Distribution (SED).
astLib.astSED.StellarPopulation:
This class describes a stellar population model, either a Simple
Stellar Population (SSP) or a Composite Stellar Population (CSP),
such as the models of Bruzual & Charlot 2003 or Maraston 2005.
astLib.astWCS.WCS:
This class provides methods for accessing information from the
World Coordinate System (WCS) contained in the header of a FITS
image.