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This is World Space Week

2011 Theme Celebrates Human Spaceflight

This is World Space Week Billed as the largest public space event on Earth and celebrated in more than 55 nations, World Space Week is held every October 4-10, dates chosen to recognize the launch of Sputnik 1 on October 4, 1957, and the signing of the Outer Space Treaty on October 10, 1967. World Space Week was established by the United Nations General Assembly to be an international celebration of science and technology and is coordinated by the United Nations Office for Outer Space Affairs with the support of World Space Week Association.

The 2011 theme is "50 Years of Human Spaceflight" and emphasizes that international collaboration has been key to the success of humans in space. According to the World Space Week Association:

As of 2010, human spaceflight missions have been conducted by the former Soviet Union, Russia, the United States, the People's Republic of China and by the private space flight company Scaled Composites. Several other countries and space agencies have announced and begun human spaceflight programs by their own technology, including India (ISRO), Ecuador (EXA), Japan (JAXA), Iran (ISA) and Malaysia (MNSA).  

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