Mosaic tiles depicting three historic figures of the Soviet Union's space program.  Left to right:  Soviet rocket scientist Konstantin Eduardovich Tsiolkovsky (1857-1935),  cosmonaut Yuri Gagarin (1934 -1968), and Soviet rocket engineer and designer Sergey Korolyov (1906-1966), Russia.
Mosaic tiles depicting three historic figures of the Soviet Union's space program. Left to right: Soviet rocket scientist Konstantin Eduardovich Tsiolkovsky (1857-1935), cosmonaut Yuri Gagarin (1934 -1968), and Soviet rocket engineer and designer Sergey Korolyov (1906-1966), Russia.