Unmanned space missions

100 Unmanned space missions are those using remote-controlled spaceship. The first such assignment was the Sputnik I assignment, launched October 4, 1957. Some missions are more appropriate for unmanned missions rather than manned space missions, due to minor cost and lower risk factors. Since the early 1970s, most unmanned space missions have been based on space probe with built-in assignment computers, and as such may be classified as entrenched systems.

Most American unmanned missions have been synchronized by the Jet Propulsion Laboratory, and European missions by the European Space Operations Centre, part of ESA. ESA has conducted comparatively few space examination missions. ESA has, however, launched a variety of spacecraft to carry out astronomy, and is a coworker with NASA on the Hubble Space Telescope. There have been a great number of very winning Russian space missions. There were also a small number of Japanese and Chinese missions.