Zvezdochka was launched into space on March 25, 1961. He orbited one time in final preparation for the Vostok 1 mission. Zvezdochka was named by cosmonaut Yuri Gagarin.
Zvezdochka was sent into space with a wooden cosmonaut dummy in the final practice flight before Gagarin's flight on 12 April. The dummy was ejected out of the capsule while Zvezdochka remained inside. Both were recovered successfully.
During the 1950s and 1960s the USSR used dogs for sub-orbital and orbital space flights to determine whether human spaceflight was feasible. In this period, the Soviet Union launched missions with passenger slots for at least 57 dogs.
The number of dogs in space is smaller, as some dogs flew more than once. Most survived; the few that died were lost mostly through technical failures, according to the parameters of the test