In 1923, Hermann Oberth published The Rocket to Planetary Spaces, later expanded as Ways to Space Travel. This showed that it was possible to build machines that could leave Earth’s atmosphere and reach orbit. He described the general principles of multiple-stage liquid-fueled rockets, solar sails, and even ion drives. He proposed sending humans into space, building space stations and satellites, and travelling to other planets.
«Европа бьет сама по себе». Страну НАТО заподозрили в организации атаки на российский газовоз. Новые подробности атаки на судно20:45
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Пьяный турист нанес тяжелую травму участвовавшей в Олимпиаде сноубордистке20:38
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3月2日消息，原星纪魅族副总裁曾洋已于近日加盟小米集团公关部，任职媒介总监。根据公开信息，曾洋在星纪魅族担任副总裁，负责市场品牌和公关传播事务，此前就职于中央电视台财经频道，历任记者、主编、制片人等职务。在加入星纪魅族之前，曾洋任职于知乎，担任党委副书记、执行总编辑、研究院院长等职务，还曾就职于京东公关部。（鞭牛士）