14 of the most important space missions of all time

From the very first satellite to more recent achievements like the first lunar south pole landing, these are the most important space missions in history.Of course, there have also others that did not involve humans or that did not cross the Kármán line.As Russian-Soviet aerospace engineer Konstantin Tsiolkovsky put it, in a line famously quoted by Carl Sagan, "The Earth is the cradle of mankind. But one does not live in the cradle forever.

He launched aboard the Vostok 1 mission, which saw him circle Earth once over the course of 108 minutes before ejecting himself from the spacecraft after reentry and parachuting back down to Earth.On July 15, 1965, NASA's Mariner 4 spacecraft transmitted the first images of another planet. Its images of Mars were taken from a vantage point roughly 6,100 miles away from the surface of the Red Planet.

Though the spacecraft's systems were fried by the intense heat and surface pressure on Venus within an hour, the mission was able to collect a wealth of data on our planetary neighbor. The orbital telescope has changed our perception of the cosmos and it continues to act as a reference for many of the observations performed by the James Webb Space Telescope today.NASA's Mars Pathfinder rover reached the surface of Mars on July 4, 1997. As it descended towards the Red Planet's surface, it deployed several airbags to allow it to stay intact during landing.

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