7 Things to Know About Space Shuttle Endeavour

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  • Space Shuttle Endeavour, NASA
  • Space Shuttle Endeavour, NASA
  • Space Shuttle Endeavour, NASA
  • Space Shuttle Endeavour, NASA
  • Space Shuttle Endeavour, NASA
  • Space Shuttle Endeavour
  • Space Shuttle Endeavour, NASA
  • Space Shuttle Endeavour, NASA

Internationally Known

In December 1998, Endeavour delivered the Unity node, a bridge that links the "working and living modules" to the International Space Station, the first of two major pieces added on the American side of the space research complex. "By attaching Unity, it became a space station, and an international one at that," space historian Robert Pearlman told space.com. (Photo: Paolo Nespoli - ESA/NASA via Getty Images)