NASA Photo ID: STS047-54-018      File Name: 10064973.gif 
 
Film Type: 70mm                   Date Taken: 09/20/92 
 
Title: Sunrise, Earth Limb, SW Pacific Ocean 
 
Description: 
 
The colors of this sunrise/sunset scene provide insights into the relative  
density of the Earth's atmosphere (15.5S, 158.5E).  This scene captures the  
silhouette of several thunderstorms with their cirrus anvil tops spreading  
out against the tropopause - the top of the lowest layer of atmosphere, the  
troposphere which is also the most dense and refracts light at the red end 
of  the spectrum while the blues refract in the stratosphere, the highest 
layer.