Space Spotlight: Mars' moons and Medusa

• Story Highlights
• Each week CNN showcases some of our favorite space-related photos
  
• Deimos, the smaller of Mars' two moons, has a surface blanketed by rocks
  
• The Medusa galaxy has "hair" -- a tidal tail formed by a collision between galaxies
  
• Canada's autumn colors are shown in an image taken by the Envisat spacecraft
  
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