Changes

The '''Space Shuttle Endeavour''' was the fifth American [[Space shuttle]] orbiter.  Named for the vessel of the 18th century British explorer [[James Cook]] and made mainly of spare parts, the orbiter Endeavour was constructed as a replacement for the [[Space Shuttle Challenger]], which was lost in 1986.  Many improvements were made during the construction of Endeavour which were used in the retrofits of the other shuttle orbiters.<ref>http://www.nasa.gov/centers/kennedy/shuttleoperations/orbiters/endeavour-info.html</ref> The Endeavour is one of three active Shuttles (the other two are [[Discovery]] and [[Atlantis]]).

The '''Space Shuttle Endeavour''' was the fifth American [[Space shuttle]] orbiter.  Named for the vessel of the 18th century British explorer [[James Cook]] and made mainly of spare parts, the orbiter Endeavour was constructed as a replacement for the [[Space Shuttle Challenger]], which was lost in 1986.  Many improvements were made during the construction of Endeavour which were used in the retrofits of the other shuttle orbiters.<ref>https://www.nasa.gov/centers/kennedy/shuttleoperations/orbiters/endeavour-info.html</ref> The Endeavour is one of three active Shuttles (the other two are [[Discovery]] and [[Atlantis]]).

==External links==

==External links==

NASA [http://www.nasa.gov/mission_pages/shuttle/main/index.html]

NASA [https://www.nasa.gov/mission_pages/shuttle/main/index.html]

==References==

==References==