Simplify the following text for a Grade 7 native English-speaking person.
Original: Laika , a stray , originally named Kudryavka ( Little Curly ) , underwent training with two other dogs , and was eventually chosen as the occupant of the Soviet spacecraft Sputnik 2 that was launched into outer space on November 3 , 1957 .
Simplified: Laika was launched in Sputnik 2 satellite on November 3 , 1957 .