A redundancy of redundanciesWhile the space shuttle systems were being designed in the 1970s, a more immediate mission was already underway, and it needed a different kind of resiliency: the Voyager missions to the outer planets. In 1964, a Jet Propulsion Lab (JPL) scientist, Gary Flandro, calculated that by the late 1970s, Jupiter, Saturn, Uranus, and Neptune would be in the right alignment to allow a probe to visit each planet by using gravity assists, swinging around a planet for acceleration. Such an alignment happens once every 175 years.
Александра Синицына (Ночной линейный редактор)
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В Иране раскрыли главные просчеты США в конфликте14:48
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“我们推动建立船员权益保障中心，为船员权益依法护航。看到中国巨轮驰骋四海、与国家共进，心里满是光荣。”倪迪说。