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[[Early History#16th centuryCentury|1582]] – The Gregorian Calendar is introduced by Pope Gregory XIII. <br>
[[1957]] – Launch of ''Sputnik I'', the first artificial [[satellite]] to [[orbit]] the [[Earth]]. <br>
[[1959]] – The Russian [[satellite]] ''Luna 3'' is launched, orbiting the [[Luna|Moon]] and photographing 70% of the Moon's far side.<br>
