Simplify the following text for a Grade 10 native English-speaking person.
Original: Their aversion to gold was not mentioned until their attempt to destroy the planetoid Voga ( the so-called `` Planet of Gold '' ) in Revenge of the Cybermen ( 1975 ) .
Simplified: It was not mentioned that they did not like gold until their attempt to destroy the planetoid Voga ( the so-called `` Planet of Gold '' ) in Revenge of the Cybermen ( 1975 ) .