Simplify the following text for a Grade 16 native English-speaking person.
Original: In 1977 , a recording of `` Liu Shui '' ( Flowing Water , as performed by Guan Pinghu , one of the best qin players of the 20th century ) was chosen to be included in the Voyager Golden Record , a gold-plated LP recording containing music from around the world , which was sent into outer space by NASA on the Voyager 1 and Voyager 2 spacecrafts .
Simplified: In 1977 , a recording of `` Flowing Water '' ( Liu Shui , as performed by Guan Pinghu , one of the best qin players of the 20th century ) was chosen to be included in the Voyager Golden Record , a gold-plated LP recording containing music from around the world , which was sent into outer space by NASA on the Voyager 1 and Voyager 2 spacecrafts .