Simplify the following text for a Grade 7 native English-speaking person.
Original: Thebe was discovered by Stephen P. Synnott in images from the Voyager 1 space probe taken on March 5 , 1979 , and was initially given the provisional designation ' .
Simplified: It was found by Stephen P. Synnott in images from the Voyager 1 space probe taken on March 5 , 1979 and was given the designation ' .