His hobbies include game sports, history of aviation and cosmonautics and astronomy. Here, he made copies of his "Introduction to Cosmonautics". Afterwards he developed his theories on cosmonautics. The topics of interest are&colon; astronomy, physics mathematics, mechanics, Earth sciences, cosmonautics, and electronics. He translated "Introduction to Cosmonautics" into Russian. The word "cosmonautics" had previously not existed in neither French nor Russian. A. Gagarin Medal of the Cosmonautics Federation, Russia. The Memorial Museum of Cosmonautics is located inside the base of the monument. On Cosmonautics Day, 2009, the museum was reopened after three years of reconstruction. After the war, Ary continued to write about cosmonautics, into the space era. In October the DOSAAF Cosmonautics Committee invited the Group to function under its auspices. Over the next few years Sternfeld worked in cosmonautics for the USSR Academy of Sciences.