Simplify the following text for a Grade 5 native English-speaking person.
Original: It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard et al . in 2004 from pictures taken in 2003 .
Simplified: It was found by a team of astronomers from the University of Hawaii led by Scott S. Sheppard et al . in 2004 from pictures taken in 2003 .