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[[19581936]] – Two rockets designed by the German engineer Ernst Mohr, the first German post-war rockets, reach Actor Walter Koenig ([[Earth]]'s upper [[atmospherePavel Chekov|Cmdr. Pavel Chekov]]) is born. <br>[[1959]] – The Soviet [[probe ]] ''Luna 2 '' crashes onto [[Luna|the Moon]], becoming the first [[human]]-made object to reach it. <br>[[2015]] – The first [[Human]] observation of [[gravity|gravitational wave]]s is made, - a century after they were predicted. :*<bri> These gravity waves —ripples -ripples in the fabric of [[Space-time|spacetime]]— - are believed to result from a cataclysmic event calculated as 1.3 billion light years away from [[Earth]].[[Physics|Physicists]] describe these waves as being produced in the final fraction of a second of a collision of two [[black hole]]s merging into a single, more massive, spinning black hole. A portion of their mass is converted into the energy carried by a strong burst of gravitational waves, as given by E=mc².</i>