The international celebration commemorates the achievements and contributions of space science, technology, and its applications. The events of World Space Week stretch from Oct. 4 — the launch anniversary of the first human-made Earth satellite, Sputnik 1, in 1957 — to Oct. 10, the anniversary of the signing of the Outer Space Treaty in 1967, which governs how to use space, such as the moon and other celestial bodies, peacefully.