Simplify the following text for a Grade 6 native English-speaking person.
Original: Adrastea was discovered by David C. Jewitt and G. Edward Danielson in Voyager 2 probe photographs taken on July 8 , 1979 , and received the designation ' .
Simplified: It was found by David C. Jewitt and G. Edward Danielson in Voyager 2 probe photographs taken in 1979 and received the designation ' .