The first official World Space Week was celebrated in the year 2000, following the United Nations General Assembly's declaring it an annual event in 1999. The annual celebration runs from October 4th to 10th to commemorate the launch of Sputnik 1 on October 4, 1957, and the Outer Space Treaty's entry into force on October 10, 1967.
What Happened in History: Browse Historical Facts on Kudos 365
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