On November 3,1957 Sputnik 2 was launched into orbit.
When Sputnik 2 was launched into orbit, this time it had a passenger.It was an experimental dog called Laika, Laika was actually the first women in space. Sputnik 2 was the first biological spacecraft.
The first living being in space.
This is the structure of Sputnik 4.
Strelka and Belka
Strelka and Belka were on the Sputnik 5 mission.
On May 15,1958 Sputnik 3 was launched.
It was an automatic scientific spacecraft.Sputnik 3 did not come out of orbit until April 6, 1960.
On May 16,1950 Sputnik 4 was launched.
Sputnik 4 had a dummy of a man.It was used to investigate the means of manned space flight.
Sputnik 5 was launched on August 19,1960.
It carried two dogs, Strelka and Belka. After one day of flight the spacecraft and dogs were recovered successfully.
On December 1,1960 Sputnik 6 was launched.
Once again it carried two dogs, Pchelka and Mushka . Unfortunately when they did the re-entry the cabin burned up and so did the animals inside.