Answer the following question given this paragraph: Television broadcasts also use radio waves. Sounds are encoded with frequency modulation, and pictures are encoded with amplitude modulation. The encoded radio waves are broadcast from a TV tower like the one in Figure below . When the waves are received by television sets, they are decoded and changed back to sounds and pictures. Q: What are groups of tens to hundreds of thousands of stars held tightly together by gravity called? Choices: - elliptical clusters - elongated clusters - galaxy - globular clusters A:
globular clusters