NASA Photo ID: STS040-77-045       File Name: 10064361.jpg
  Film Type: 70mm                    Date Taken: 06/14/91
  Title: Great Lakes Region, State of Michigan, USA
  Description:
  Most of the Great Lakes Region (45.0N, 84.0W) appears in this single photo
  as  well as part of COLUMBIA's payload bay and spacelab module.  In the
  center,  Lake Michigan and Chicago are clearly visible.  The absence of
  clouds over  the lakes is because of different temperatures between the
  landmass and the  lakes.  The warming land surface causes air to rise and
  form clouds while the  cold lake water retards cloud growth and remain
  cloud free.                    
  Subject terms:
  CITIES                                  
  CLOUDS                                  
  EARTH OBSERVATIONS (FROM SPACE)         
  GREAT LAKES (NORTH AMERICA)             
  LAKES                                   
  MICHIGAN                                
  STS-40
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