Simplify the following text for a Grade 9 native English-speaking person.
Original: The first photographs of Perdita were taken by the Voyager 2 spacecraft in 1986 , but it was not recognized from the photographs for more than a decade .
Simplified: The first pictures of Perdita were taken by the Voyager 2 spacecraft in 1986 , but it was not recognized from the photographs for more than a decade .