Q:  What is the approximate temperature
      of SS Cyg, based on this spectrum?
      Note that wavelengths are given in Angstroms;
      convert to nm using

                1 nm  =  10 Angstroms 


         The peak of the spectrum is at about 78 Angstroms,
         which is about 7.8 nm.  That means

                  2,900,000  nm*K
            T  = -----------------  =  approx  370,000 K
                    7.8 nm


         Hot!