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Ary Abramovich Sternfeld

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Through Poland and Russia

He was the first person to describe the bi-elliptic transfer technique of changing orbits, in 1934.

In 1934, Sternfeld won the Prix REP-Hirsch (later known as the Prix d'Astronautique) of the French Astronomical Society for his book Initiation à la Cosmonautique. He is thus credited with introducing the word cosmonautics in the language of science and engineering.

Early life

Ary Abramovich Sternfeld was born 14 May 1905 in the city of Sieradz in Poland, then in Kalisz Governorate of Russian Empire, near Łódź, into a merchant family. He had three sisters. From a young age he displayed wonderful memory, a good imagination and a sharp mind. He was still a child when he considered a trip to the moon, when he saw the moon return to a crescent at the start of the month and prayed with his father that the moon would remain unobtainable to enemies, but wondered why it was unobtainable. He considered flying through space. The implementation of his dream -the day would come when flying through space would go from a fantasy to reality-gave him life. When World War One broke out, the family moved to Łódź. Here, Ary attended a Jewish gymnasium. In school his first ideas about implementing spaceflight appeared. It was advisable to use a rocket with fuel onboard. He later had another idea to send a rocket from the sun, using the heat. At 17, he read in German Einstein's monograph about relativity. He did not understand a lot of it. He decided to write to Einstein with his questions. Afterwards, he developed his theories on cosmonautics.

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